Re: [CentOS] CentOS 8 virt-manager
On Sat, 12 Oct 2019, Ljubomir Ljubojevic wrote: > On 10/12/19 4:57 PM, Tom Bishop wrote: > > I am thinking about building a new host and trying to decide if > > virt-manager is working on CentOS 8. I thought I saw previously on the mail > > list that there were some issues but cannot find the thread right now. If > > anyone has migrated some workloads from 7 and seen any issues let me know. > > > > Thanks :) > > ___ > > CentOS mailing list > > CentOS@centos.org > > https://lists.centos.org/mailman/listinfo/centos > > > MArk wrote that virt-manager is replaced by "cockpit" in EL8. Can not > comfirm or deny. from RHEL 8 virtualization guide: "The Virtual Machine Manager (virt-manager) application is still supported in RHEL 8 but has been deprecated. The RHEL 8 web console is intended to become its replacement in a subsequent release. It is, therefore, recommended that you get familiar with the web console for managing virtualization in a GUI." rday -- Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] moving from centos 8 to stream? (and possibly back again?)
just installed stock centos 8 x86_64 and did "dnf update", now reading up on centos stream, and wondering: 1) can i, at any time, decide to convert this system to centos stream, notwithstanding any normal updates i've done in the meantime? 2) if i'm running centos stream and decide it's just too progressive for me, can i dial it back to "regular" centos down the road? rday -- ================ Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] [LEARNING OUTCOME] Wi-Fi WPA Hacking Tool is Totally Useless on New Wireless Routers
On Mon, 19 Mar 2018, Turritopsis Dohrnii Teo En Ming wrote: > Hi, > > I am sharing my learning outcomes. > > Recently I downloaded Kali Linux 64-bit Version 2018.1 and ran it on > my HP laptop with the integrated Intel Dual Band Wireless-AC 8260 > Wireless Network Card. ... snip ... you just posted this to the fedora users mailing list, why do you think this content is appropriate for either of those mailing lists since it has nothing to do specifically with fedora or centos? rday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] yum list "available" versus "updates", and centosplus versioning
quite possibly more a yum question than a centos question, but i'm a bit confused about the difference between listing "available" packages versus "updates" packages. short example -- listing what the yum man page suggests should be "available" for installation, restricting myself to centosplus: $ yum list available --disablerepo=\* --enablerepo=centosplus ... snip ... Available Packages kernel-plus.x86_643.10.0-693.17.1.el7.centos.plus centosplus kernel-plus-abi-whitelists.noarch 3.10.0-693.17.1.el7.centos.plus centosplus kernel-plus-devel.x86_64 3.10.0-693.17.1.el7.centos.plus centosplus kernel-plus-doc.noarch3.10.0-693.17.1.el7.centos.plus centosplus kernel-plus-headers.x86_643.10.0-693.17.1.el7.centos.plus centosplus kernel-plus-tools.x86_64 3.10.0-693.17.1.el7.centos.plus centosplus kernel-plus-tools-libs.x86_64 3.10.0-693.17.1.el7.centos.plus centosplus kernel-plus-tools-libs-devel.x86_64 3.10.0-693.17.1.el7.centos.plus centosplus perf.x86_64 3.10.0-693.17.1.el7.centos.plus centosplus postfix.x86_642:2.10.1-6.0.1.el7.centos centosplus postfix-perl-scripts.x86_64 2:2.10.1-6.0.1.el7.centos centosplus postfix-sysvinit.noarch 2:2.10.1-6.0.1.el7.centos centosplus python-perf.x86_643.10.0-693.17.1.el7.centos.plus centosplus $ first, i always thought "yum list available" would list only packages that i did not *already* have installed, and if i wanted to list installed packages eligible for update, i would run: $ yum list updates --disablerepo=\* --enablerepo=centosplus Updated Packages postfix.x86_642:2.10.1-6.0.1.el7.centos centosplus python-perf.x86_643.10.0-693.17.1.el7.centos.plus centosplus $ as you can see, the alleged updates are also listed as "available" from the first command -- has it always been this way? if so, i guess i just never noticed. (is there a way to list *only* available, uninstalled packages with some sort of filter?) more curiously, some of the available packages from the centosplus repo have a package version that says merely "centos", not "centos.plus": postfix.x86_642:2.10.1-6.0.1.el7.centos centosplus postfix-perl-scripts.x86_64 2:2.10.1-6.0.1.el7.centos centosplus postfix-sysvinit.noarch 2:2.10.1-6.0.1.el7.centos centosplus ^^ is that deliberate? it would seem to have the potential for confusion if one searches later for packages based on that string. finally, the alleged update for python-perf: python-perf.x86_643.10.0-693.17.1.el7.centos.plus centosplus would seem to match *exactly* the currently installed numeric version on my system: $ rpm -q python-perf python-perf-3.10.0-693.17.1.el7.x86_64 $ that is, both seem to be "3.10.0-693.17.1.el7", so how would this constitute an available "update"? perhaps there's something fundamental about version numbering and the centosplus repo i'm missing here. rday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] why does "rescue" mode bring me to runlevel 5 (multi-user target)?
On Fri, 2 Mar 2018, John Hodrien wrote: > On Fri, 2 Mar 2018, Robert P. J. Day wrote: > > > finishing a week of teaching a comptia linux+ class off of centos > > 7.4 and wanted to demo how to boot to "rescue" mode, so i rebooted, > > selected "rescue" mode at grub menu, which still booted to full > > multiuser, graphical mode. what am i doing wrong? or is this a dumb > > question? > > It's is not what you think it is. > > $ yum info dracut-config-rescue > > It's not the same as the rescue mode off the DVD. ah, gotcha ... so the course manual is definitely misleading. rday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] why does "rescue" mode bring me to runlevel 5 (multi-user target)?
finishing a week of teaching a comptia linux+ class off of centos 7.4 and wanted to demo how to boot to "rescue" mode, so i rebooted, selected "rescue" mode at grub menu, which still booted to full multiuser, graphical mode. what am i doing wrong? or is this a dumb question? rday -- ================ Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to update modules in iniramfs fastly
On Mon, 26 Feb 2018, wuzhouhui wrote: > > -Original Messages- > > From: "Steven Tardy" > > Sent Time: 2018-02-26 10:48:48 (Monday) > > To: "CentOS mailing list" > > Cc: > > Subject: Re: [CentOS] How to update modules in iniramfs fastly > > > > On Sun, Feb 25, 2018 at 8:29 PM wuzhouhui > > wrote: > > > > > I know dracut can update modules in initramfs, but I think it is too > > > slow. So I'm wondering what is the fastest way to update modules in > > > initramfs of CentOS 7? > > > > > > `dracut` calls `mkinitrd` which rebuilds the initrd file. . . you could do > > it manually but that is prone to errors ( > > https://access.redhat.com/solutions/24029). i think you have that backwards ... mkinitrd is simply a wrapper around a call to dracut, which builds an initramfs. > This solution does not work in CentOS 7, because initramfs in CentOS > 7 is not a gzipped cpio: it is, but to get to the content, you need to use "skipcpio" to jump over the initial tiny cpio archive. see, for example: https://sites.google.com/site/syscookbook/rhel/rhel-kernel-rebuild rday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] what is the centos/elrepo policy toward LTS kernels?
On Fri, 23 Feb 2018, Akemi Yagi wrote: > On Fri, Feb 23, 2018 at 12:30 AM, Robert P. J. Day > wrote: > > > > i'm sure there's a simple answer to this -- i already understand > > that newer kernels than the ones shipped with the official release > > aren't officially supported but there is the elrepo kernel repository > > here: > > > > http://elrepo.org/linux/kernel/el7/x86_64/RPMS/ > > > > with a mixture of long-term (lt) and mainline (ml) kernels. i assume > > that the mainline kernels pretty closely track the latest kernel > > release but that's not the one i'm interested in. > > > > if i was interested in the additional longevity of the LTS kernels, > > i can see that 4.4 is available. but the most recent LTS kernel was > > 4.14, was it not? so why is a 4.14 "lt" kernel not available in that > > repository? > > > > i am obviously unclear on the policy used to determine which kernel > > versions end up in that repository. > > > > rday > > You want to ask elrepo-related questions on the elrepo mailing list. > > But here's the post that would answer your question: > > http://lists.elrepo.org/pipermail/elrepo/2018-February/004120.html ah, was not aware there was a separate mailing list for that, my apologies. rday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] what is the centos/elrepo policy toward LTS kernels?
i'm sure there's a simple answer to this -- i already understand that newer kernels than the ones shipped with the official release aren't officially supported but there is the elrepo kernel repository here: http://elrepo.org/linux/kernel/el7/x86_64/RPMS/ with a mixture of long-term (lt) and mainline (ml) kernels. i assume that the mainline kernels pretty closely track the latest kernel release but that's not the one i'm interested in. if i was interested in the additional longevity of the LTS kernels, i can see that 4.4 is available. but the most recent LTS kernel was 4.14, was it not? so why is a 4.14 "lt" kernel not available in that repository? i am obviously unclear on the policy used to determine which kernel versions end up in that repository. rday -- ================ Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] a few simple questions about upgrading an "official" centos 7 release
On Thu, 22 Feb 2018, hw wrote: > Robert P. J. Day wrote: ... snip ... > >oh, i appreciate the need for caution; on the other hand, it > > always struck me that the training room is the *ideal* place for > > students to experiment with things they're too nervous or unsure > > of to try back at the office. this is typically why, when i'm > > teaching, i save friday afternoon for trying things that are > > typically not covered by standard courseware. > > > >so as long as one delivers the proper caution, i see no problem > > with something like, "ok, you might never have to do this at your > > site, but just in case you ever need to upgrade your kernel, let's > > try it and see what happens." so if the need ever arises, at least > > they can say they've done it once and know what the end result is > > supposed to be. > > The students you need to teach things like this are the ones that > will never become good admins. uh, that's kind of a condescending attitude to take towards students who simply want to learn. are you this way with everyone? rday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] a few simple questions about upgrading an "official" centos 7 release
On Thu, 22 Feb 2018, Pete Biggs wrote: > > > > > finally, any concerns i should have about upgrading the kernel from > > 3.10 to 4.14 or 4.15, as explained in a number of places like this: > > > > https://www.tecmint.com/install-upgrade-kernel-version-in-centos-7/ > > > > i simply prefer to run a current kernel but i can resist the > > temptation if upgrading that on a centos 7.4 system would introduce > > more problems than are worth it. > > > The only reason to use a kernel version that isn't provided with the > distro is if the newer kernel provides features that you **NEED**. > > Remember, the whole point of something like CentOS is to provide a > stable, solid OS. This requires a whole bunch of testing of the OS > as a whole - and RHEL (and hence CentOS) does all that testing using > kernels it provides. What's more RH will backport critical kernel > updates if appropriate - so it's not the case that an older kernel > is lacking in security. > > I seem to remember you said you were going to teach using these > machines - surely you want those machines to be as stable and as > standard as possible to the machines the students will find in the > wild. I would definitely not encourage students to upgrade kernels - > novices sysadmins don't need an extra level of uncertainty in their > life! oh, i appreciate the need for caution; on the other hand, it always struck me that the training room is the *ideal* place for students to experiment with things they're too nervous or unsure of to try back at the office. this is typically why, when i'm teaching, i save friday afternoon for trying things that are typically not covered by standard courseware. so as long as one delivers the proper caution, i see no problem with something like, "ok, you might never have to do this at your site, but just in case you ever need to upgrade your kernel, let's try it and see what happens." so if the need ever arises, at least they can say they've done it once and know what the end result is supposed to be. rday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] a few simple questions about upgrading an "official" centos 7 release
again, some fairly trivial(?) questions about working with centos 7.4, given my time immersed in fedora so i want to make sure i'm not carrying over any bad habits. first, is there anything untoward in updating an installed version of centos 7.4 with a simple "yum update"? i'm well aware of keeping in mind the goal of stability with centos, so am unsure what the philosophy is of pulling in new updates as cavalierly as i do with fedora. currently, "yum list updates" shows me 206 possible updates; should i have any concern about updating packages coming from the standard centos repos? next, are there any issues replacing yum wihth dnf? i found this piece: https://www.vultr.com/docs/use-dnf-to-manage-software-packages-on-centos-7 which suggests it shouldn't be a problem. thoughts? finally, any concerns i should have about upgrading the kernel from 3.10 to 4.14 or 4.15, as explained in a number of places like this: https://www.tecmint.com/install-upgrade-kernel-version-in-centos-7/ i simply prefer to run a current kernel but i can resist the temptation if upgrading that on a centos 7.4 system would introduce more problems than are worth it. thoughts? rday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] is the centos wiki "Additional Resources/Repositories" page reasonably up to date?
(apologies for what will be some upcoming trivial questions, but i'm jumping back into centos after years and years of living with fedora, so i'm feeling fairly comfortable, just the occasional centos-specific question.) is the wiki repos page fairly up to date? https://wiki.centos.org/AdditionalResources/Repositories i ask since i note that its last edit was 2017-06-25, and things might have changed in the last several months. rday ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] are there reference lists/cheat sheets for categorized commands?
prepping to teach a 5-day CompTIA linux+ course next week with
CompTIA-supplied courseware and, given that it was my choice, i chose
to set up the classroom with centos 7.4 on all the student systems
since i assume most students are there to learn sysadmin and that's
the most likely platform they'll have when they get back to work.
also, most students are taking this course to prep for the subsequent
LPI exams to get their certification, which plays into my question.
while the C/W is not bad, it's awfully verbose, and it would be
handy if there were concise cheat sheets of commands/files related to
the standard sysadmin they'll be expected to answer questions on. as
an example, regarding user/group management, i'm collecting all of the
relevant commands that they need to know about, in the sense of, "if
you understand these commands, you should be fine."
regarding user/group admin, my tentative list of commands would be:
* user{add,mod,del}
* group(add,mod,del}
* passwd, gpasswd
* chage, chsh, chfn
* pwck, grpck
* pwconv, pwunconv
not sure what i'm missing here, i just typed those off the top of my
head.
rather than scatter all of that over an entire chapter, are there
any official centos/rhel reference sheets like that? if not, i can
just write my own and post them at my wiki. thanks for any pointers.
rday
--
================
Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] recommended way to install source rpms?
On Sun, 10 Oct 2010, John R. Dennison wrote: > On Sun, Oct 10, 2010 at 05:56:47PM -0400, Robert P. J. Day wrote: > > > > my plan is to install yum-utils to get yumdownloader, add the repo > > file suggested above, then have students: > > Are these students paying for whatever training you are > supplying? and on that patronizing, condescending note, this list has pretty much outlived its usefulness. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] recommended way to install source rpms?
On Sun, 10 Oct 2010, Frank Cox wrote: > On Sun, 2010-10-10 at 17:56 -0400, Robert P. J. Day wrote: > > so, is that reasonable? to just manually add an extra repo file > > according to that link above (which appears to work perfectly > > well). > > In my opinion, in most cases there is no particularly good reason to > bother compiling a source rpm yourself unless it's something that's > not already in a repository. but no one is suggesting that you always want to *compile* a source rpm. perhaps you just want to examine the source, or do a prep, or something. more to the point, it's a little disturbing that the general attitude here seems to be one of, "we don't think you should be doing something, so we're not going to tell you how to do it." and some people here wonder why others might want to write their own online centos howtos rather than contribute to centos.org? geez, feel free to stop wondering. if it makes it easier, perhaps that wiki page could be retitled something more general, such as "working with source rpms." then it could cover simple repo setup and downloading and, with a suitable warning, also cover building. but it's a little high-handed to not explain how to do something because you've decided it's not something you want *others* to know. rday -- Robert P. J. Day Waterloo, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] recommended way to install source rpms?
yes, i've read the online docs and followed a link or two to find a simple way to do this, such as: http://sourceware.org/systemtap/wiki/SystemTapOnCentOS so, these days, is that the canonical way to download source rpms? now, note that i'm not arguing about whether this is a good idea. in my circumstances, i want the ability to just "yum download" source rpms so that i can have my students poke around in a source rpm and learn how to build one, nothing more. so, is that reasonable? to just manually add an extra repo file according to that link above (which appears to work perfectly well). frankly, the wiki page on downloading from source: http://wiki.centos.org/PackageManagement/SourceInstalls seems just a touch on the hysterical side. i don't disagree that installing packages from the source rpm is probably a questionable idea. but that doesn't justify simply not explaining how to do it easily. my plan is to install yum-utils to get yumdownloader, add the repo file suggested above, then have students: $ yumdownloader --source so they can examine the source of some packages. is the approach i'm suggesting reasonable? thanks. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RHEL 6 potential release date???
On Sun, 10 Oct 2010, BeartoothHOS wrote: > On Fri, 17 Sep 2010 17:51:39 -0500, John R. Dennison wrote: > [] > Redhat does not discuss release dates [] > > Well, the beta is up : > > http://www.redhat.com/rhel/beta/ that is already the *second* beta of RHEL 6, so it's not really news. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] should i (theoretically) be able to boot a "git clone"d kernel on 5.5?
On Sun, 10 Oct 2010, Akemi Yagi wrote: > You can find the answer here :-) > > http://blog.toracat.org/2010/03/want-a-custom-kernel-on-centos-noo-really/ > > Akemi and that did it, thanks. so now i'm curious -- do you know what specifically requires the deprecated sysfs format during boot? i followed your blog links and i didn't immediately see an explanation for *why* that fixed it. again, thanks. rday p.s. there were, unsurprisingly, a number of startup script failures but that's something i can handle later. -- ================ Robert P. J. Day Waterloo, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] should i (theoretically) be able to boot a "git clone"d kernel on 5.5?
On Sun, 10 Oct 2010, Akemi Yagi wrote: > You can find the answer here :-) > > http://blog.toracat.org/2010/03/want-a-custom-kernel-on-centos-noo-really/ that's it? enabling deprecated sysfs? cool, i'll check that later and report back, thanks. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] should i (theoretically) be able to boot a "git clone"d kernel on 5.5?
toward the end of a class on friday, just for fun, i showed the students how to install git, clone the latest kernel source, and build and install a new kernel. since it was getting close to end of day, i wanted to keep it simple and directed them to just "make defconfig" to see what would happen. the configuration and build of the kernel and modules worked fine, they installed the kernel and modules, then rebooted but the new kernel panicked almost immediately, apparently whining that it couldn't mount the root filesystem. since they were all running LVM-based systems, i assumed that perhaps we needed to explicitly add LVM support during the config step. i'd still like to be able to build and boot a new kernel on an updated centos box so, later today, i'm going to reinstall 5.5 on a system without LVM (just define some fixed filesystems) to see if that makes a difference. has anyone done this? should i be able to? to recap, all i want to do on a fully-updated centos 5.5 box is * install the development tools * install git * clone the latest kernel repo * make defconfig * make * install new kernel and modules * reboot to new kernel i'm willing to accept that it won't be a perfect kernel and perhaps some drivers will be missing, but at the very least, it should boot without panicking. again, anyone else done this? should it work? i'll try this later today as soon as i have access to my test system again. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] does ssh-copy-id not use "id_rsa.pub" file by default?
On Thu, 7 Oct 2010, Robert Heller wrote: > At Thu, 7 Oct 2010 07:23:55 -0400 (EDT) CentOS mailing list > wrote: > > > > > On Thu, 7 Oct 2010, John Doe wrote: > > > > > From: Robert P. J. Day > > > > > > > If the -i option is given then the identity file > > > >(defaults to ~/.ssh/id_rsa.pub) is used > > > > > > My man page says: "~/.ssh/identity.pub"... > > > > argh ... sorry, i was logged into the wrong system when reading the > > man page, i was connected to my ubuntu system. interesting that > > different distros have different default files for the same command. > > i will definitely remember that. > > > My my (CentOS 5.5) man ssy-keygen: > > ~/.ssh/identity.pub > Contains the protocol version 1 RSA public key for authentica- > tion. The contents of this file should be added to > ~/.ssh/authorized_keys on all machines where the user wishes to > log in using RSA authentication. There is no need to keep the > contents of this file secret. > > identity.pub is *OpenSSH V1* public key file. How old is the ubuntu > system? Is OpenSSH V1 or V2 installed? The V1 RSA protocol is old > available for older systems... ubuntu 10.10 (yes, really, development version constantly updated to track upcoming 10.10). in short, really new. so the current centos 5.5 ssh-copy-id command clearly(?) still has openssh V1 default set. not a big deal, just surprised me. rday -- Robert P. J. Day Waterloo, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] does ssh-copy-id not use "id_rsa.pub" file by default?
On Thu, 7 Oct 2010, John Doe wrote: > From: Robert P. J. Day > > > If the -i option is given then the identity file > >(defaults to ~/.ssh/id_rsa.pub) is used > > My man page says: "~/.ssh/identity.pub"... argh ... sorry, i was logged into the wrong system when reading the man page, i was connected to my ubuntu system. interesting that different distros have different default files for the same command. i will definitely remember that. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] does ssh-copy-id not use "id_rsa.pub" file by default?
yesterday, i was demoing how to use ssh-copy-id on centos 5.5 to copy one's public key to another machine and account so you don't need to type the password anymore. i used "ssh-keygen" to create the standard RSA-format files, then checked the man page for ssh-copy-id, which reads: ssh-copy-id [-i [identity_file]] [u...@]machine ... If the -i option is given then the identity file (defaults to ~/.ssh/id_rsa.pub) is used the above seems to suggest that, as long as i'm happy copying over the default id_rsa.pub file, all i need type is: $ ssh-copy-id -i bar...@192.168.2.19 /usr/bin/ssh-copy-id: ERROR: No identities found $ clearly, that doesn't work. but if i simply add in the name of the file, it's fine: $ ssh-copy-id -i .ssh/id_rsa.pub bar...@192.168.2.19 ^^^ any reason for that? the man page clearly states that that file is the default, but it's obvious i still need to type its name. am i missing something? is the man page wrong? rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] how to get ASUS USB-N13 802.11n net adapter working on 5.5?
On Tue, 28 Sep 2010, Akemi Yagi wrote: > On Tue, Sep 28, 2010 at 5:13 AM, Robert P. J. Day > wrote: > > > however, that still doesn't do it as based on what i've read > > online), because the access point here uses WPA/WPA2, i need to > > use wpa_supplicant to be able to configure the wireless interface for > > that. and that's about when i got kicked out of the classroom as they > > were closing for the evening. > > > > thoughts? any advice humongously appreciated. > > These CentOS wili pages will help: > > http://wiki.centos.org/HowTos/Laptops/NetworkManager > > and > > http://wiki.centos.org/HowTos/Laptops/WpaSupplicant *sigh*. i really need to check the wiki first before asking stuff like this. thanks. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] how to get ASUS USB-N13 802.11n net adapter working on 5.5?
first, the short form of the question -- has anyone got that wireless adapter working on centos 5.5 and associated with an access point that uses WPA/WPA2 security? and the details. in a classroom where there is *no* wired networking at all, all PCs have only that wireless net adapter, which works fine on windows but, after installing centos 5.5, unsurprisingly, we have no networking. there is no backup wired network, and no other adapters. there is a CD that came with the adapters, with a Linux directory, so it was easy enough to dump that onto my personal centos 5.5 box, and run "make" which generated the loadable "rt3070sta.ko" module. and, yes, that module loads. so far, so good. however, that still doesn't do it as based on what i've read online), because the access point here uses WPA/WPA2, i need to use wpa_supplicant to be able to configure the wireless interface for that. and that's about when i got kicked out of the classroom as they were closing for the evening. thoughts? any advice humongously appreciated. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] couple questions about initrd.img
here's hoping this is on topic. as part of the extra goodies i'm going to give my RHEL/centos basic admin class this week, i'm going to get them to open up the standard initrd.img file and see what's inside. i just did that myself and have a couple simple questions. first, while the cpio archive physically contains a number of basic /dev special files, the top-level "init" script runs "mknod" to create them all, anyway. not a big deal, but is it fair to say that populating the initrd.img with those initial /dev files is redundant since init creates them all, anyway? also, i note that that "init" script appears to call a couple scripts/commands that don't exist in the initrd, such as hotplug and mkblkdevs. again, not a big deal but if i show the students what's in that initrd, chances are someone's going to notice the above and ask about it, so i might as well have an answer. thanks. rday -- ============ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] does having a centos wiki acct grant edit access?
On Sat, 25 Sep 2010, Ned Slider wrote: > No, an account does not automatically give you edit rights, and you > need to take this to the centos-docs list where a wiki editor will > be happy to make the edits for you. thanks muchly. rday -- ==== Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] does having a centos wiki acct grant edit access?
i just registered for a centos wiki account, and was wondering if this gives me edit capability. i'm prepping for the first of a number of RHEL/centos basic admin courses and currently working my way thru the wiki, collecting neat tricks and ideas and, occasionally, i'll stumble over typoes -- some minor, some not so much. for instance, here: http://wiki.centos.org/TipsAndTricks/YumAndRPM#head-61731905d2e34ac343baeef06e5dd296aeed67b9 the command is listed as: yum --disable "*" --enable "rpmforge" list available i'm guessing that should actually be: yum --disablerepo "*" --enablerepo "rpmforge" list available no? but even if i got edit access, i'd still be happier if someone eventually checked out any changes i made to validate them. whatever works best. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Oracle's Unbreakable Enterprise Kernel for OracleLinux!!!
On Mon, 20 Sep 2010, Karanbir Singh wrote: > On 09/20/2010 08:24 PM, mattias wrote: > > And you are a moderator? > > I am yes. Your point being ? karanbir's right, my post wasn't related to centos so it wasn't appropriate here. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Oracle's Unbreakable Enterprise Kernel for Oracle Linux!!!
On Mon, 20 Sep 2010, m.r...@5-cent.us wrote: > Robert P. J. Day wrote: > > > > http://blogs.computerworld.com/16997/oracle_rips_red_hat_and_sort_of_launches_a_new_linux > > > > oracle: just another centos wanna-be? > > > Um, this is news? I thought Oracle pushed "Unbreakable Linux" out > the door at *least* last year. read the article carefully. this isn't unbreakable linux, that *is* old news. this is oracle's (alleged) followup. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Oracle's Unbreakable Enterprise Kernel for Oracle Linux!!!
http://blogs.computerworld.com/16997/oracle_rips_red_hat_and_sort_of_launches_a_new_linux oracle: just another centos wanna-be? rday -- Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Sat, 18 Sep 2010, Eduardo Grosclaude wrote: > On Sat, Sep 18, 2010 at 5:06 AM, Robert P. J. Day > wrote: > > > p.s. one stupendously trivial idea i had was to give each student > > a cheap USB drive and use that as the vehicle for playing with > > filesystem utilities. with an $8 2G drive, i can demonstrate > > concepts like hotplugging, udev, LVM and so on, knowing i'll never > > risk the contents of the hard drive. > > That reminds me of a sysadmin course where we set up minimal, > console-only QEMU virtual machines with two virtual disks, and > taught fdisk, mkfs, RAID, LVM and the like. interesting ... is this course publicly available? be fun to take a look at it. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
i'm not ignoring all of the suggestions so far (i'm taking note of all of them) but as rp herrold suggests, a lot of this is getting pretty far afield, so let me drag this back on-topic. i'm looking for cool things that can be added into a very generic 5-day course in basic RHEL (centos) administration that wouldn't normally be covered. i've provided the outline on which the 3rd party courseware is based -- it was written to mimic red hat's RH 131 course: https://www.redhat.com/courses/rh131_red_hat_linux_system_administration/ so you can see what's already there, and i'm after cool tips, tricks and utilities that people who are long-time RHEL/centos admins have learned that they think are terrifically useful that i can sneak in as bonus content. the caveat is that i don't want to add topics that would take longer than, say, a half day since i can always take a topic like that, extend it to a full-day course, and market it *separately*. case in point: virtualization. the course already covers virtualization *very* briefly and i don't want to make that section any longer since i can easily see having a full-day course on that topic. *possibly* the same thing with puppet or cfengine (both excellent suggestions). i'm thinking of at least demoing one or both and, depending on the interest, perhaps suggesting a full day course in enterprise-wide administration. anyway, i appreciate all of the ideas so far, and i'm definitely going to use some of them. thanks muchly. rday p.s. one stupendously trivial idea i had was to give each student a cheap USB drive and use that as the vehicle for playing with filesystem utilities. with an $8 2G drive, i can demonstrate concepts like hotplugging, udev, LVM and so on, knowing i'll never risk the contents of the hard drive. -- ============ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Fri, 17 Sep 2010, Les Mikesell wrote: > Agreed that it's good to know how - but 'there isn't any rpm' should > really mean there isn't any rpm at any well-maintained location, not > just in the base system or that you didn't bother to look. Every > time you build something yourself you are taking on the job of > maintaining it forever and probably leaving people in a lurch when > you leave and someone else has to figure out what non-standard > things you did. i agree with this. i'm looking for extra goodies that don't involve possibly violating corporate IT policy by downloading and building new packages to be installed on mission-critical servers. there are certainly enough existing packages at trustworthy repos that i don't need to go beyond that. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] can i run NFS *exclusively* off of v4?
On Fri, 17 Sep 2010, Robert P. J. Day wrote: > > is it possible to set up NFS on centos 5.5 so that it uses *only* > version 4? i tried this not that long ago on fedora and was surprised > to see a complaint when i tried to start the server and was told that > i was missing required functionality of NFSv1, or something equally > weird. i'll check the /etc/init.d/nfs script, but i think what got me > into trouble was trying to use the entire set of options: > > "--no-nfs-version 1 --no-nfs-version 2 --no-nfs-version 3" > > i'm going to try it again this afternoon on centos 5.5, but has > anyone else tried this? should it *theoretically* work? as an actual example of what i'm talking about, if you take a look at /etc/sysconfig/nfs on centos 5.5, consider these lines: # Define which protocol versions mountd # will advertise. The values are "no" or "yes" # with yes being the default #MOUNTD_NFS_V1="no" #MOUNTD_NFS_V2="no" #MOUNTD_NFS_V3="no" theoretically, should i be able to uncomment all of those lines so that mountd advertises only V4? i would have thought so but, if i do that: # service nfs restart Shutting down NFS mountd: [FAILED] Shutting down NFS daemon: [ OK ] Shutting down NFS quotas: [ OK ] Shutting down NFS services:[FAILED] Starting NFS services: [ OK ] Starting NFS quotas: [ OK ] Starting NFS daemon: [ OK ] Starting NFS mountd: Usage: rpc.mountd [-F|--foreground] [-h|--help] [-v|--version] [-d kind|--debug kind] [-o num|--descriptors num] [-f exports-file|--exports-file=file] [-p|--port port] [-V version|--nfs-version version] [-N version|--no-nfs-version version] [-n|--no-tcp] [-H ha-callout-prog] [-s|--state-directory-path path] [-t num|--num-threads=num] [FAILED] # on the other hand, if i re-comment just the V1 line: # service nfs restart Shutting down NFS mountd: [FAILED] Shutting down NFS daemon: [ OK ] Shutting down NFS quotas: [ OK ] Shutting down NFS services:[FAILED] Starting NFS services: [ OK ] Starting NFS quotas: [ OK ] Starting NFS daemon: [ OK ] Starting NFS mountd: [ OK ] # now that's just silly, no? i can start the mountd daemon as long as i allow it to advertise NFSv1? rday -- Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Fri, 17 Sep 2010, Jim Wildman wrote: > On Fri, 17 Sep 2010, Robert P. J. Day wrote: > > > i've already added a section on EPEL, just so i can install > > things like git. and i know there's an entire page at centos.org > > on extra repos. any there that you *particularly* recommend? > > i'll revisit that page later today but i'm thinking that, for the > > sake of this first-level admin course, EPEL might be sufficient > > for now. > > How to identify and work your way out of rpm conflicts. (without > using nodeps of course). i've already added some of that, using things like --replacepkgs and --replacefiles and so on. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] can i run NFS *exclusively* off of v4?
is it possible to set up NFS on centos 5.5 so that it uses *only* version 4? i tried this not that long ago on fedora and was surprised to see a complaint when i tried to start the server and was told that i was missing required functionality of NFSv1, or something equally weird. i'll check the /etc/init.d/nfs script, but i think what got me into trouble was trying to use the entire set of options: "--no-nfs-version 1 --no-nfs-version 2 --no-nfs-version 3" i'm going to try it again this afternoon on centos 5.5, but has anyone else tried this? should it *theoretically* work? rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Fri, 17 Sep 2010, Les Mikesell wrote: > On 9/17/2010 8:24 AM, m.r...@5-cent.us wrote: > > > >> Proper scripting abilities are perhaps beyond reach for a short > >> course, but you could at least show off some one-liners or those > >> short, stunningly useful examples to help them get the idea that > >> they definitely should get their feet wet on it sooner or later. > > > > awk, awk! Perl's a day, minimum, by itself, but awk you can do in > > an hour or two, and have immediate results. > > But awk is a dead end that can't do a lot of things by itself. And > learning how to embed awk into other scripts is even more > syntactically obscure than just using perl in the first place. > Besides, perl's '-c' check and debug facilities make it much more > usable to beginners than awk's propensity to find errors mid-run > (and worse, mid-some-other-script because you had to embed it). i will probably throw in an hour or so of shell scripting, just enough to whet their appetites and make them want an actual course. :-) rday -- Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Fri, 17 Sep 2010, Les Mikesell wrote: > I'd consider the most valuable things to know about would be the > nature of an assortment of 3rd party yum repositories (i.e. EPEL > makes an effort not to overwrite core packages but probably won't > have everything you want), how to find and install their *-release > packages, how to use yum to search and install things from them, and > that most of them should left disabled in the yum configuration so > they don't affect things unless you explicitly enable them on the > command line for a search or specific package you want. i've already added a section on EPEL, just so i can install things like git. and i know there's an entire page at centos.org on extra repos. any there that you *particularly* recommend? i'll revisit that page later today but i'm thinking that, for the sake of this first-level admin course, EPEL might be sufficient for now. > Oh - and how to install and use freenx/NX for remote access. h ... good idea. or i might just add in VNC and carry over the freenx to an additional course dealing with networking/remote admin/etc. thanks. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Fri, 17 Sep 2010, Keith Roberts wrote: > Adding Multimedia capabilities > > Using SQLite3 from the command line > Creating a Database > Creating and populating a table > Selecting, inserting, updating and deleting data in the > database > > Remote login sessions using ssh -X > > Intro to nmap, nessus and Metasploit > > Intro to Firefox plugins, eg Firebug > How to find and install other usefull FF plugins. > > Obviously the list is endless really. not entirely. keep in mind that this is an *admin* course for RHEL/centos so any additional topics should be primarily server-oriented. that suggests that things like multimedia would have little value. heck, even graphical utilities might be irrelevant since, as a server, the system might not even have X installed. so, yes, i realize this is still being a bit vague. i'm just interested in what others have found as being really, really useful in the context of setting up a server. rday -- ============ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] should vsftpd be disabled in favour of sftp for security reasons?
On Fri, 17 Sep 2010, Michel van Deventer wrote: > > > > (another in an ongoing list of things i just want to clarify for the > > sake of future courses taught on centos.) > > > > from this RHEL doc page: > > > > http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Deployment_Guide/s1-openssh-server-config.html > > > > the reader is advised to, for the sake of security, remove/disable > vsftpd, ostensibly in favour of sftp/sftp-server. really? > > > > i can obviously see disallowing stuff like telnet and rsh and > > rlogin, that's a no-brainer. but advising against vsftpd for the sake > of security? i'm not sure i see the logic in that. thoughts? > As FTP is a clear-text protocol, I would surely advise against > leaving it on :) I only run a vsftpd server on one of my machines > for the customers comfort, but that will change in the near future ! > > I can easily image scenarios where unencrypted traffic with > usernames/passwords is disallowed. but you can configure vsftpd to have secure connection: http://wiki.vpslink.com/Configuring_vsftpd_for_secure_connections_(TLS/SSL/SFTP) would that not address that issue? i'm not arguing against secure communications, only that that manual page so cavalierly dismisses vsftpd when it seems clear that you *can* configure vsftpd to be secure. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Fri, 17 Sep 2010, Michel van Deventer wrote: > Hi, > > > > >> > >> On Fri, 2010-09-17 at 03:39 -0400, Robert P. J. Day wrote: > >> > other ideas? > >> > Maybe a crash course in troubleshooting using the rescue CD ? > > I don't know exactly which subjects are covered in your course ? Can > you be more precise ? :) sure. while it's a 3rd-party courseware manual, it was obviously written to emulate fairly closely red hat's admin course here: https://www.redhat.com/courses/rh131_red_hat_linux_system_administration/details/ so the best way i can sum it up is that it's a perfectly decent admin course that covers all the standard admin topics you'd expect to see. all i was interested in was any additional packages or configuration that people on this list have used to great effect that most people would *not* have thought of or heard of. for instance, is anyone version controlling their system config files with a utility like, say, "etckeeper"? that sort of thing. i just want to pad out some of the sections with a few more items. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] should vsftpd be disabled in favour of sftp for security reasons?
(another in an ongoing list of things i just want to clarify for the sake of future courses taught on centos.) from this RHEL doc page: http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Deployment_Guide/s1-openssh-server-config.html the reader is advised to, for the sake of security, remove/disable vsftpd, ostensibly in favour of sftp/sftp-server. really? i can obviously see disallowing stuff like telnet and rsh and rlogin, that's a no-brainer. but advising against vsftpd for the sake of security? i'm not sure i see the logic in that. thoughts? rday -- ======== Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Fri, 17 Sep 2010, Frank Cox wrote: > > On Fri, 2010-09-17 at 03:39 -0400, Robert P. J. Day wrote: > > other ideas? > > LTSP an intriguing idea, but that might be a bit ambitious and might also cut into future marketing. one of my plans is that, after this week-long course is over, i want to market to the same client some quick, 1-day courses that go further and each cover a very specific topic. for example, i can imagine a 1-day course in virtualization. maybe a 1-day course in server security. a course in monitoring and system tuning. and perhaps a course in advanced networking that would incorporate LTSP. so i'm more looking for ideas that are nice add-ons to the generic course, but that don't jump so far ahead that they might take a bite out of a future course that i could market. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] looking for cool, post-install things to do on a centos 5.5 system
(note: i asked this a few days ago but it *appears* that that post was tossed due to getting excessive bounces from my account. so i'm posting it again, apologies if you're seeing it a second time.) over the next several weeks, i'm teaching some courses in RHEL admin but (unsurprisingly) i'll be using centos 5.5. it's a decently-written, 3rd party course, all the generic, standard admin topics but it does leave me about a 1/2 day to throw in any cool stuff i want to add. so, any recommendations for neat things that people here have done in the way of what can be added to or configured on a centos server system? the course covers all the standard topics -- installation, package management, service management, filesystem maintenance, that sort of thing. so i'm looking for bonus, neat stuff that others here do as a matter of course when putting together a centos system. logging utilities? intrusion detection? monitoring? anything that leaps to mind that i can use to fill up a few more hours. i'm already thinking of showing how to build and boot a new kernel. other ideas? thanks. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] how to show that a filesystem is ACL-enabled?
On Thu, 16 Sep 2010, Miguel Medalha wrote: > > > can someone clarify this? is there a command that shows whether a > > filesystem is currently acl-enabled? and is the mount man page > > simply incomplete in that respect? thanks. > > tune2fs -l /dev/[hda1,sda1] > > The values between [ ] are an example only. Replace, of course, with > your own storage device. > > Look at "Filesystem features" and "Default mount options". ah, excellent, i can see that "default mount options" includes "acl", and i'm going to guess that that's a kernel config option that's selected on a per-filesystem type basis. thanks. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] how to show that a filesystem is ACL-enabled?
currently reading the RHEL deployment guide and i have a short question about ACLs that i can test on my centos 5.5 box. here: http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Deployment_Guide/ch-acls.html the manual clearly claims that, in order to use ACLs on a filesystem, that filesystem must be mounted with the "acl" mount option, and even shows a sample /etc/fstab entry that represents that. however, i just verified that i can use setfacl to give my non-root account read access to /etc/shadow so, clearly(?), the root filesystem supports ACLs, but the mount entry for that filesystem in /etc/fstab reads only "defaults" and, as i read it in the man page for "mount", the "defaults" option is not listed as including the "acl" option. can someone clarify this? is there a command that shows whether a filesystem is currently acl-enabled? and is the mount man page simply incomplete in that respect? thanks. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] why does automounting removable media always have options nodev, noexec, nosuid?
i'm experimenting with some basic removable media mounting exercises for an upcoming class, and i read that, while you can use gconf-editor to change some of the mount options in cases like that, there is no way to override the mount options of nodev, noexec and nosuid. for example, that claim is made here (admittedly for fedora, but it appears to be true for centos as well): http://scrolls.mafgani.net/2007/03/gnome-automount-options/ is there somewhere that one could see and verify that those options always hold for mountable filesystems on removable media? thanks. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] can i config/build/boot a new kernel on centos 5.5 with LVM?
(disclaimer: i'll be a bit vague about some of this since i don't have a test system to try to reproduce it until later today or this weekend.) during a RHEL SA course i was teaching this week, i was using both centos 5.5 and RHEL 6.0 beta 2 and, as a fun exercise, i was showing how to "git" checkout the kernel source tree, configure it, build, install and boot to a new kernel. sadly, at no time did that exercise actually work, so i just want to ask a general question -- should i, with a standard install of centos 5.5 with all of the required development packages, be able to checkout the kernel source, and build and boot a new kernel? upon reflection, the issues might have to do with the fact that LVM was in use and perhaps the initrd didn't have LVM support built in but, again, i can't check that until later today at the earliest. so, here's the hypothetical scenario i'm going to test later: * gateway, 64-bit laptop, with 64-bit centos 5.5, fully updated * /boot is primary ext4 partition * / and /home are logical volumes in a single volume group * "git clone" latest kernel source * "make defconfig" * "make" * "make modules_install" * "make install" is there any reason why the above shouldn't work? (and instead of "make defconfig", i can copy the /boot/config file for the stock kernel and "make oldconfig". i'll almost certainly try both just to cover all the possibilities.) so ... should this theoretically work? is there a web page that actually walks through the process? because we were having all kinds of grief just installing the kernel or booting and failing to find the root device (which is why i suspect something LVM-related.) i'm open to suggestions. thanks. rday p.s. obviuosly, i'd love to hear that someone else has already done this and it worked just fine. -- Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] how many folks are *seriously* using ACLs?
i'm just curious -- how many people here are using ACLs as a regular and significant part of their sys admin? rday -- Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] xen vs kvm for virtualization on centos/rhel?
On Mon, 9 Aug 2010, Karanbir Singh wrote: > On 08/09/2010 08:16 PM, Robert P. J. Day wrote: > >> how much of this courseware is open source licensed ? Would you be > >> willing to contribute some /all of it towards the CentOS wiki / docs > >> effort ? > > > >sorry, it's not my C/W, it's being licensed for this course. > > From whom ? i don't think there's any issue in admitting that it's courseware from http://onsight.com. i was called in to teach a course in RHEl admin, and that was the courseware that was chosen. i have a copy of the manual and it's actually not bad. and i'm not one to gratuitously compliment other peoples' courseware. :-) rday -- ==== Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] xen vs kvm for virtualization on centos/rhel?
On Mon, 9 Aug 2010, Karanbir Singh wrote: > On 08/09/2010 07:06 PM, Robert P. J. Day wrote: > >as i'm reviewing the courseware for the rhel (centos) course > > i'm teaching next week, i'm going to ask the occasional question, > > possibly technical, possibly more policy. > > how much of this courseware is open source licensed ? Would you be > willing to contribute some /all of it towards the CentOS wiki / docs > effort ? sorry, it's not my C/W, it's being licensed for this course. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] xen vs kvm for virtualization on centos/rhel?
as i'm reviewing the courseware for the rhel (centos) course i'm teaching next week, i'm going to ask the occasional question, possibly technical, possibly more policy. first one involves the choice for virtualization. the course has a short section involving virt using xen but everything i've read suggests that red hat is concentrating on kvm for virt. thoughts on that? i have the freedom to replace the xen section with one covering kvm instead. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] what people really mean when they say they're running "5.3"?
more a terminology usage question than anything else, but in a couple of weeks, i'll be teaching the first of a few sessions on RHEL admin and, unsurprisingly, i'll be using centos (as i've done in the past). when i asked the organizer to identify the specific version of RHEL that was being used at the client site, i was told 5.3 so i can easily install 5.3 on the classroom machines, but i'm curious about something and i'll have my contact look into it: if people *initially* install 5.3, is it standard behaviour to still regularly upgrade as new releases come out? obviously, i have to ask my contact to verify what the client has been doing all this time but, in general, what's the normal behaviour for people running centos/rhel? and is there a way to examine an install to see how updated it's been since that original installation? i just don't want to teach off of 5.3, only to find out later that they've been keeping up to date and 5.5 would have been a more appropriate choice. thanks for any tips. rday -- ============ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] [OT] introductory online kernel programming course
On Sun, 13 Jun 2010, Karanbir Singh wrote: > On 06/12/2010 10:33 PM, Robert P. J. Day wrote: > > > >yes, it's OT but just in case folks here know someone who might be > > interested, i'm writing and publishing a course to introduce people to > > the joys of linux kernel programming: > > > > please leave commercial postings of this nature off this list. sorry, my apologies. rday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] [OT] introductory online kernel programming course
yes, it's OT but just in case folks here know someone who might be interested, i'm writing and publishing a course to introduce people to the joys of linux kernel programming: http://www.crashcourse.ca/introduction-linux-kernel-programming/introduction-linux-kernel-programming and, no, it's not free -- six months worth of course will cost you all of $39 (CAD), but the first four lessons are free so you can see what you're getting into and decide whether you think it's worth it. this is the only mention i'll make of that here. if you want to keep up with new developments, feel free to follow me on twitter. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Top-notch, inexpensive online Linux/OSS/kernel courses: http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] OT: SysAdmin Stories
On Sun, 6 Jun 2010, Geoff Galitz wrote: > > What will be the intended audience? How much technical detail can > > be mentioned? Does one assume that the readers know what is grub, > > initrd, xen, amavisd etc? > > > The intended audience is anyone in the Systems Administration or > Systems Engineering field at any technical level. It is assumed > basic technologies such as grub and initrd are already known, but > not necessarily well understood. I may add technical introductions > to those technologies if needed. > > Contributors should not worry too much about this, it is my job as > editor/writer to make sure that needed relevant technical > information is introduced as necessary. i see the potential for amusing anecdotes. geek humour, as it were. http://www.youtube.com/watch?v=8WM977mANl8 rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] how to build a centos kernel?
a couple folks on the local mailing list were asking about the mechanics of building a kernel for a centos system, and they seemed to suggest that there were some intricacies involved as opposed to other distros. i've never tried it -- is there a trick or something? got a pointer to the canonical web page that has the directions? thanks. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RHEL 6 beta manuals online
On Thu, 22 Apr 2010, Dominik Zyla wrote: > Anyone knows which kernel version will RHEL-6 use? based on the contents of my ISO image, 2.6.32. rday -- ==== Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RHEL 6 beta manuals online
On Wed, 21 Apr 2010, Kwan Lowe wrote: > On Wed, Apr 21, 2010 at 8:18 AM, Robert P. J. Day > wrote: > > > still a few bugs in the system or something. from here: > > > > https://inquiries.redhat.com/go/redhat/rhel-6-beta > > > > if you choose to "skip registration", you get: > > > > "550 Failed to change directory." > > > > or am i missing something? > > It's up there now... I haven't started a download but I can navigate > the tree fine. yes, it's working now. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RHEL 6 beta manuals online
On Wed, 21 Apr 2010, Kwan Lowe wrote: > On Wed, Apr 21, 2010 at 7:07 AM, Jim Perrin wrote: > > On Wed, Apr 21, 2010 at 6:44 AM, Jure Pečar wrote: > > > >> Yes but it doesn't show up under 30day trial subscription. Is it available > >> for accounts with paid subscription? > > > > I don't see it in my channel listings (for paid subscription) yet. > > > > > > http://press.redhat.com/2010/04/21/red-hat-enterprise-linux-6-beta-available-today-for-public-download/ > > It's a public beta.. still a few bugs in the system or something. from here: https://inquiries.redhat.com/go/redhat/rhel-6-beta if you choose to "skip registration", you get: "550 Failed to change directory." or am i missing something? rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] another small glitch regarding 3rd party repos -- samba sernet link broken
(sorry, i'm not *trying* to be a pain, i am merely succeeding.) once again, here: http://wiki.centos.org/AdditionalResources/Repositories there's a reference to "The SerNet Samba 3 Repository" -- that link is broken, the directory structure over at http://ftp.sernet.de/pub/samba/ has changed somewhat. also, the current dirs over there go up to samba 3.4 but, as of today, samba 3.5.0 is out: http://news.samba.org/releases/3.5.0/ i'm sure someone else will look into that. :-) rday -- ============ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] issues with 3rd party repos for centos
i'm reading the lowdown on 3rd party repos with respect to centos here: http://wiki.centos.org/AdditionalResources/Repositories and i have a couple questions and observations. first, the entry for centosplus reads: "Popular packages from this repository include: postfix with database support, a rebuilt kernel with additional drivers & filesystem support, php5 and mysql5." however, i popped over to the centosplus packages site: http://mirror.centos.org/centos-5/5.4/centosplus/ and checked under x86_64, but i don't see any php or mysql packages. am i misreading something? next, regarding remi collet's repo: "Has been recommended on the mailing list and forum for mysql 5.1 and php5.2.9." however, if you check over there (say, under x86_64): http://rpms.famillecollet.com/enterprise/5/remi/x86_64/repoview/development.languages.group.html remi appears to already be up to php 5.3.1 (and even 5.3.2 under the "test" link), so the centos wiki page is a bit out of date. finally, all i want is to install PHP 5.3.x (and, obviously, dependent packages) on a stock centos 5.4 system. is remi collet's repo a good choice for that? the centos wiki recommends "extreme caution" for that repo, which makes me nervous. more to the point, are there any serious issues involving bumping up php to 5.3.1 on a stock centos 5.4 system while leaving everything else where it is? rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] [OT?] recommendation for simple wiki S/W to run on centos 5.4?
any testimonials for some simple wiki software to run on centos 5.4 on an intranet? all i'm after is something uncomplicated that (ideally) yum installs, and that others can start using to start sharing useful info, nothing more. thoughts? rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] recommendations for SMS/EMS/MMS software simulation?
perhaps an open-ended request, but i'm looking for (if it even exists) some centos 5.4 software that will let me completely simulate the sending and reception of MMS messages on a local network which (AFAICT) would require the simulation of the MMS centre as well (MMSC). so far, i've run across (yum-installable) gammu and i'm just starting to take a look at it. but if anyone out there has already been down that road, i'm open to recommendations. i'm just getting immersed in the world of messaging systems and if there's something that would allow me to simulate all of this on a local network, i would be a deliriously happy puppy. thanks. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] how to push the bounds and get newer packages for centos 5.4?
i've just started looking after a (virtual) centos 5.4 server that's hosted at rackspace and, unsurprisingly, it was set up with all the standard defaults. part of the work i'll be doing involves php and, as i read it, the standard php version with centos 5.4 is php-5.1. if i *wanted* to move up to a more recent version (say, php-5.3), obviously, i'd need to go outside the limits of the standard centos yum repos. in my travels, i ran across this site: http://blog.famillecollet.com/pages/Config-en with the corresponding instructions: wget http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-3.noarch.rpm wget http://rpms.famillecollet.com/enterprise/remi-release-5.rpm rpm -Uvh remi-release-5*.rpm epel-release-5*.rpm i'm suitably leery of 3rd-party repos but i recall that someone else (on this list?) recommended that site. and i can see that it has an x86_64 version of php-5.3 ready to go for centos 5.4: http://rpms.famillecollet.com/enterprise/5/remi/x86_64/repoview/php.html what are the recommendations for well-respected 3rd-party repos for centos 5.4 if i want to get newer packages? the centos 5.4 system in question is purely an internal development system so i have the freedom to customize it to some extent if newer packages are called for. thanks. rday -- ============ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] [OT?] diffs between mysql 5.0 and 5.1, and upgrading to mysql 5.1?
being used to mysql 5.1 on my fedora system, i'm suddenly looking after a centos 5.4 box with mysql 5.0.77. before i start digging into the mysql 5.0-5.1 changelog, do i have a lot to worry about in terms of mentally backing up one version? or is simply upgrading the centos box to mysql 5.1 an option? (i realize that mysql 5.1 is *not* officially supported in centos 5.4.) rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
On Sat, 13 Feb 2010, Jim Green wrote: > On 13 February 2010 10:13, Ron Loftin wrote: > > > > On Sat, 2010-02-13 at 10:00 -0600, Jim Green wrote: > >> Dear Centos community, > >> I am new to centos/redhat and I would like to know on a centos system, > >> can I use yum alone to do all package management? I don't want to learn > >> two systems and confuse myself, I understand yum is much better than > >> rpm if is the case? > > > > I expect that you will get a bunch of replies on this. > > > > The short form is that yum lives on TOP of RPM. It is not a replacement > > for RPM. > > > > Yum does most of the thinking for you as far as dependency > > management. It is much more user-friendly, and is the preferred > > mechanism for software installation and maintenance because it > > does the dependency resolution for you, and saves much in the way > > of headaches, elevated stress, confusion, and RSI from excessive > > keyboard use. > > > > All that being said, there are times when you do want to use RPM > > by itself, without Yum. If you stay with CentOS and/or RedHat > > long enough, you will run across this situation now and then. > > Thank Robert and Ron, Could you list an example where I need to use > rpm command alone? I used rpm to install stand alone package if that > is the case. i suspect there are yum alternatives for some of these but here's some stuff i like: $ rpm -qa # list all installed packages $ rpm -qR# list dependencies of package $ rpm -ql# display list of files in package $ rpm -qf # what package is from? and many others. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
On Sat, 13 Feb 2010, Jim Green wrote: > Dear Centos community, I am new to centos/redhat and I would like to > know on a centos system, can I use yum alone to do all package > management? I don't want to learn two systems and confuse myself, I > understand yum is much better than rpm if is the case? yum is simply a layer built on top of rpm. it's nice if you can do everything you want with yum, but it doesn't hurt to learn the basics of rpm anyway. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] where is MySQL-zrm-client rpm package?
i was looking at options for backing up mysql databases across the net, and ran across this: http://www.zmanda.com/download-zrm.php clearly, there are two rpms for linux: * MySQL-zrm-2.2.0-1.noarch.rpm * MySQL-zrm-client-2.2.0-1.noarch.rpm but on a centos 5.4 system, if i do # yum search zrm i see only "MySQL-zrm.noarch". anyone know why the centos repo would only know about one of those packages? i suspect that, to be safe, i should download the ones from the zmanda site. rday -- ======== Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] dm-crypt/LUKS the state of the art for block device encryption?
On Tue, 2 Feb 2010, Joshua Baker-LePain wrote: > On Tue, 2 Feb 2010 at 12:00pm, Robert P. J. Day wrote > > > it's been a while since i've played with filesystem encryption > > so, on centos 5.4 (and other linux distros), is dm-crypt/LUKS > > considered to be the state of the art WRT encryption? i remember > > other solutions like loop-aes and others, but what's considered > > the gold standard these days? > > dm-crypt/LUKS is what the installer in Fedora sets up these days, so > I'd say it's still the "standard" solution. i suspected so, i just thought i'd confirm. thanks. rday -- ==== Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] dm-crypt/LUKS the state of the art for block device encryption?
it's been a while since i've played with filesystem encryption so, on centos 5.4 (and other linux distros), is dm-crypt/LUKS considered to be the state of the art WRT encryption? i remember other solutions like loop-aes and others, but what's considered the gold standard these days? rday -- ============ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Virtualization - what do You recommend?
On Tue, 2 Feb 2010, Victor Padro wrote: > You can only install KVM or VMWare Workstation/Server in CentOS, I > think you should try KVM, because it's opensource and it supports > Windows but you need special hardware like the latest CPUs from AMD > or Intel... just to clarify, you're saying that KVM requires H/W virtualization support, either VT-x or AMD-V, yes? because at this point, i don't think that really qualifies as "special hardware" anymore, it's pretty common. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] any significant differences between centos and OEL?
On Sat, 23 Jan 2010, Jim Perrin wrote: > On Sat, Jan 23, 2010 at 7:47 AM, Robert P. J. Day > wrote: > > > > someone just pointed out to me that there is a distro called > > "oracle enterprise linux" which is effectively a re-branded RHEL, > > so i'm curious -- has anyone here used both centos and OEL and > > would there be any differences that would be worth caring about? > > > > the only thing i can think of that might be worthwhile is that > > OEL might change some of the default kernel parms thru > > /etc/sysctl.conf that make that distro more appropriate for > > running large oracle databases. beyond that, i have no idea. > > > > thoughts? > > CentOS is essentially a doggedly faithful rebuild of RHEL. OEL adds > some tweaks, php-oracle, and various other mods they feel are > appropriate. Last I looked, it was available for free, but the > updates and support came with a price tag attached. This may have > changed, and I make no claims as to its stance. ok, that's useful to know. my original question was meant to address only the *technical* differences, but knowing about mandatory support and/or licensing is also useful. > There's also a moral implication. RH's staff has vocally supported > CentOS, and we contribute back to the RH community though bug > reporting, bug fixes, suggestions, patches, etc. We don't charge for > CentOS support, so we don't impact RH's business. Oracle on the > other hand DOES offer paid support, which impacts RH's business, and > I don't see any substantive attempts by oracle to give anything back > to the community at large. again, not really a technical issue but good to know, thanks. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] any significant differences between centos and OEL?
On Sat, 23 Jan 2010, Fabian Arrotin wrote: > Robert P. J. Day wrote: > > someone just pointed out to me that there is a distro called "oracle > > enterprise linux" which is effectively a re-branded RHEL, so i'm > > curious -- has anyone here used both centos and OEL and would there be > > any differences that would be worth caring about? > > > > the only thing i can think of that might be worthwhile is that OEL > > might change some of the default kernel parms thru /etc/sysctl.conf > > that make that distro more appropriate for running large oracle > > databases. beyond that, i have no idea. > > > > thoughts? > > > > Price ? OEL 5.4 is freely downloadable so i'm guessing that's not it. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] any significant differences between centos and OEL?
someone just pointed out to me that there is a distro called "oracle enterprise linux" which is effectively a re-branded RHEL, so i'm curious -- has anyone here used both centos and OEL and would there be any differences that would be worth caring about? the only thing i can think of that might be worthwhile is that OEL might change some of the default kernel parms thru /etc/sysctl.conf that make that distro more appropriate for running large oracle databases. beyond that, i have no idea. thoughts? rday -- ============ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] The directory that I am trying to clean up is huge
On Sat, 23 Jan 2010, Marcelo M. Garcia wrote:
> Robert Heller wrote:
> >>
> >> -bash: /usr/bin/find: Argument list too long
> >
> > 'man xargs'
> >
> > find -print | xargs rm
> >
> Hi
>
> Just curious. What is the difference between the command above and "find
> -exec rm -f {} \;" ?
the find ... -exec variation will invoke a new "rm" command for
every single file it finds, which will simply take more time to run.
beyond that, the effect should be the same.
rday
--
Robert P. J. Day Waterloo, Ontario, CANADA
Linux Consulting, Training and Kernel Pedantry.
Web page: http://crashcourse.ca
Twitter: http://twitter.com/rpjday
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] centos courseware?
On Wed, 20 Jan 2010, b.j. mcclure wrote: > > On Wed, 2010-01-20 at 10:31 -0500, Robert P. J. Day wrote: > > > > does anyone here have pointers or access to courseware that could be > > used to teach centos (5.4, i believe)? publicly-available, free C/W > > would, of course, be ideal, but if you have some decent training > > manuals that you're willing to license on a per-manual basis, i'm > > still willing to chat. > > > > rday > I find the RHEL Deployment Guide very helpful in this regard. > Sorry. I don't have the link handy at the moment but it's available > on the RH website.HTH. yes, i've already bookmarked those. i was curious in that there are some deployment guides at the centos site: http://www.centos.org/docs/5/ but they stop at 5.2. any reason for that? rday -- ==== Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] followup to request for centos C/W
just to follow on my earlier post, i have pointers to a couple commercial C/W manuals for RHEL administration, but both of them use an entire chapter discussing virtualization using Xen. i'm under the impression that RH is firmly in the KVM camp (at least for now), and that learning Xen on red hat/centos wouldn't be as useful as learning KVM. thoughts? rday -- ======== Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] centos courseware?
does anyone here have pointers or access to courseware that could be used to teach centos (5.4, i believe)? publicly-available, free C/W would, of course, be ideal, but if you have some decent training manuals that you're willing to license on a per-manual basis, i'm still willing to chat. rday -- ======== Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] why no centos 5.3 or 5.4 online manuals?
i zipped over to centos.org to check out the 5.4 manuals, and what i found was: http://www.centos.org/docs/5/ which stops at 5.2. now, i don't really see this as a problem since i can always get what i need here: http://www.redhat.com/docs/manuals/enterprise/ i'm just curious as to whether centos is just not bothering to rebrand the manuals since it's just as easy to get that info from red hat. rday -- ============ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] centos vs rhel vs scientific linux
i'm prepping to teach a 5-day intro class in linux starting in about 3 hours, and the courseware is clearly designed around RHEL (apparently 5.1). but since i'm not being provided with RHEL DVDs, i'm just going to hand everyone a centos 5.4 DVD and take it from there. as part of the intro, i want to briefly discuss the varieties of linux related to RHEL, so obviously i want to mention what centos is all about. in a nutshell, it's simply RHEL with any RH-proprietary branding removed, yes? what's the simplest way to sum up the difference in a sentence or two? and i've never used SL but, again as i understand it, it's also RHEL unbranded but, IIRC, SL is more open to producing updates, whereas centos is rigourous about tracking the corresponding RHEL version. does that sound about right? rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] proper protocol for installing a *really* new package?
On Fri, 4 Dec 2009, Nicolas Thierry-Mieg wrote: > Robert P. J. Day wrote: > > > >what is the proper approach to install on centos 5.4 a package > > that's newer than the currently supported one? at the moment, > > AFAICT, the latest "poppler-utils" package for centos is 0.5.4. > > however, the source is up to version 0.12: > > > >http://poppler.freedesktop.org/ > > > > which matches the current fedora version, but that's not > > surprising since, naturally, fedora zips right along keeping up > > with that sort of thing. > > > >however, i have a case where it's important that a newer > > version of poppler-utils (and, consequently) poppler be installed > > on a centos 5.4 box. someone has claimed he's done it by (gack! > > choke!) installing the fedora package. that just creeps me out. > > in any case, what would be the proper solution under centos? is > > there a "rawhide"/dev equivalent for centos? thanks. > > You could get an SRPM from fedora and tryo to "rpmbuild --rebuild" > it. Since poppler is a library, you may have to also rebuild any > packages that depend on it (evince, poppler-utils and xfig on my > system, maybe others on yours). You should do this as non-root, > check out the centos wiki and list archive for details on that. oh, i've built my share of rpms from source on fedora, that's not a problem. i'm just thinking of possible dependency issues. given how much newer the source rpm would be, i can only imagine what that new binary rpm might need in the way of newer dependencies that don't even exist under centos. i'll give it a shot and see what happens. thanks. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] proper protocol for installing a *really* new package?
what is the proper approach to install on centos 5.4 a package that's newer than the currently supported one? at the moment, AFAICT, the latest "poppler-utils" package for centos is 0.5.4. however, the source is up to version 0.12: http://poppler.freedesktop.org/ which matches the current fedora version, but that's not surprising since, naturally, fedora zips right along keeping up with that sort of thing. however, i have a case where it's important that a newer version of poppler-utils (and, consequently) poppler be installed on a centos 5.4 box. someone has claimed he's done it by (gack! choke!) installing the fedora package. that just creeps me out. in any case, what would be the proper solution under centos? is there a "rawhide"/dev equivalent for centos? thanks. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] the ongoing wait for centos 5.4
On Mon, 19 Oct 2009, Robert P. J. Day wrote: > On Sun, 18 Oct 2009, Miguel Medalha wrote: > > > I am burning the DVD ISO image to disk right now. It is available > > from some mirrors. > > i've checked a couple dozen random mirrors, and have yet to find > it. i'm almost tempted to ask, "any idea on when 5.4 will be > available?", but i just *know* that would get me in trouble. i'm going to echo an earlier sentiment and say that, as much as i grouse about this release confusion and frustration, i appreciate the efforts of the centos folks and maybe i should stop grousing and volunteer to help out. just FYI, my impatience at getting my hands on 5.4 is based on the fact that i'm scheduled to teach a small class next month on RHEL, and the students are indifferent as to whether it's actual RHEL or centos, and they're also good with it being 5.3 or 5.4, so i was hoping to get centos 5.4 ASAP and play with it just to make sure i'm comfortable with the changes. if i teach off of 5.3, it's not a big deal, but 5.4 would just be a bit more fun. rday -- ============ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] the ongoing wait for centos 5.4
On Sun, 18 Oct 2009, Miguel Medalha wrote: > I am burning the DVD ISO image to disk right now. It is available > from some mirrors. i've checked a couple dozen random mirrors, and have yet to find it. i'm almost tempted to ask, "any idea on when 5.4 will be available?", but i just *know* that would get me in trouble. rday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] the ongoing wait for centos 5.4
amusingly, only 41 minutes ago, this from centos twitter: "we ran into a few issues on internal centos.org machines - all resolved now :) we should start seeding to external mirrors shortly" and *that's* what i was talking about -- we just want to be kept informed. thanks. rday -- ============ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] the ongoing wait for centos 5.4
at the risk of picking at that scab a bit longer, i'm going to toss out a comment regarding people still waiting for the public availability of centos 5.4. here: http://lists.centos.org/pipermail/centos/2009-October/083743.html we read: "The last status (from twitter) is 2 days old with the '5.4 is baked! centos internal network will start syncing up today. Release ~ soon!'. Any ETA?" followed by the response: "Just relax and wait, this is a _volunteer_ based project. Want a release date? Go pay for RHEL." not to put too find a point on it, but that reply is more than a bit dickish. it doesn't *matter* if it's a volunteer project. as i see this, this is turning into an issue of credibility. once someone posts that the 5.4 release is allegedly "baked" and syncing is beginning, then it's not unreasonable that people will start getting anxious to see it hit the mirrors. and as the days go by, it's not unreasonable for those people to start wondering what the heck is going on. again, whether people are being paid to do any of this work is not relevant. it's important, from the perspective of reputation, that everyone see the centos project as being efficiently and competently run, and making what *appears* to be an announcement of completion and the beginning of syncing servers, followed by days of awkward silence and increasingly defensive rhetoric, is not the way to do it. it just looks bad. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] so when's 5.4 going to be out? :-)
no, no, just kidding, but this is interesting: http://news.cnet.com/8301-13505_3-10376762-16.html rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] fully open source ECM? yup.
it's all about the open source, baby. http://candyandaspirin.blogspot.com/2009/09/next-adventure-in-ecm-begins.html DISCLAIMER: the lady in question is a good friend of mine. but don't let that scare you off. :-) rday -- ======== Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RHEL, centos and seeing if i now understand this
On Wed, 24 Jun 2009, Spiro Harvey wrote: > "Robert P. J. Day" wrote: > > ok, given the flurry of responses to my original post, let me see if > > i have a handle on this as i think i've finally figured it out and, > > yes, it does make sense. > > This also would have been clear had you done some research in > advance of your postings here -- not very thorough for someone who > appears to have to support himself (and possibly his family) via > consultancy work. > > Ask yourself: What does paying money to Redhat get me? And then go > read up on their website. the issue was not what support was available from *redhat*, it was trying to clarify what was available from the *centos* community. but thanks for playing. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Linked In: http://www.linkedin.com/in/rpjday Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] RHEL, centos and seeing if i now understand this
ok, given the flurry of responses to my original post, let me see if i have a handle on this as i think i've finally figured it out and, yes, it does make sense. the scenario is that there is a very large software company in the area whose only officially supported linux platform is currently suse. however, they are getting increasing call to have their product run on red hat. for most of their clients (who are fairly sizable) who will want official support, RHEL will be the obvious choice and the software company will advertise that RHEL is what they support. the SW company will be happy, the clients will be happy, and red hat will be happy. on the other hand, if there is the occasional client who is perhaps not as large, or doesn't have a budget for RHEL, centos will be the obvious option if they're prepared to do their own support. that scenario will, i'm guessing, not be that common so red hat has nothing to worry about it in terms of cutting into their revenue stream in any significant way. and, finally, for any client that chooses centos, that will represent a possible support contract for independent linux consultants. sound about right? rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Linked In: http://www.linkedin.com/in/rpjday Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] link to "commercial support" page isn't really helpful
On Mon, 22 Jun 2009, Scott Silva wrote: > If they want commercial support, what is wrong with RedHat? That is > what they do. CentOS is a "community supported" enterprise distro. > Most organizations that want support usually look for an established > business entity. > > Besides, paid contracts at the top of the food chain keeps the > scraps floating down to the rest of us. If RedHat ever sees CentOS > as a competition, they will surely do something to make it more > difficult. you're right, and i'm starting to appreciate the distinction people have been pointing out to me. that still means the "commercial support" page should be clarified to make that obvious in some way. rday -- ============ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Linked In: http://www.linkedin.com/in/rpjday Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] link to "commercial support" page isn't really helpful
On Mon, 22 Jun 2009, Les Mikesell wrote: > Sorin Srbu wrote: > > > >> p.s. let me make it clear why i'm being so obnoxious at the > >> moment about this. a local company currently supports their > >> software suite on linux on suse only. they're getting more call > >> for RH support. i'd like to suggest they consider centos because > >> i might get some support business out of it. as part of their > >> consideration, they will undoubtedly go to centos.org and poke > >> around, and i want them to be happy with what they read there, > >> and not be scared off. and maybe, out of the goodness of their > >> hearts, they'll donate to centos because they like it so > >> *everybody* wins. > > > > With that said, any commercial company needing a linux OS with > > paid support and that likes CentOS, should go for RHEL as a first > > choice; CentOS is after all a clone of RHEL. > > > > On another track, CentOS is a very mature enterprise OS and puts > > other similar distros to shame IMO. Overall, this is as good as it > > gets. Like it or not. > > And there is always the issue that if Red Hat sees Centos as > competition in the supported OS business, they will make the cloning > and updates more difficult. yes, that's a good point, politically speaking and, yes, i do understand the value of politics. to be more accurate, it's not the local company that would be getting into centos, so much as the clients that run their software, so this would be a per-client decision. i'm guessing that most of them would opt for the safety and support of RHEL, but perhaps a few of the smaller ones would be happy with centos. as a guess, i'd suspect that what would happen would be a nice gain for red hat, with a much smaller additional win for centos -- small enough that it probably wouldn't even show up on RH's radar. but, again, i'm just guessing. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Linked In: http://www.linkedin.com/in/rpjday Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] link to "commercial support" page isn't really helpful
On Mon, 22 Jun 2009, Sorin Srbu wrote: > "Commercial support is currently unavailable, although this is being > investigated by the community. The difficulty is that CentOS is a > volunteer run effort." > > Don't overreact Spiro. I really like your blurb, but the difficulty > sentence has a negative ring. Please rephrase that single line and > you get a gold-star. ;-) > > I see Day's point, this is really a "soft value", the touchy feely > stuff, nothing technical, and it's not about lying either, it just > sounds negative, that's all. that is *exactly* the point i was trying to make -- words have emotional content, so avoid the ones with the *wrong* emotional content. and, yes, when it comes to promoting a product, sometimes it *does* come down to touchy feely stuff. rday p.s. let me make it clear why i'm being so obnoxious at the moment about this. a local company currently supports their software suite on linux on suse only. they're getting more call for RH support. i'd like to suggest they consider centos because i might get some support business out of it. as part of their consideration, they will undoubtedly go to centos.org and poke around, and i want them to be happy with what they read there, and not be scared off. and maybe, out of the goodness of their hearts, they'll donate to centos because they like it so *everybody* wins. does that clear things up a bit? :-) -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Linked In: http://www.linkedin.com/in/rpjday Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] link to "commercial support" page isn't really helpful
On Mon, 22 Jun 2009, Bent Terp wrote: > On Mon, Jun 22, 2009 at 1:27 AM, Robert P. J. Day > wrote: > talk to someone with a marketing background. seriously. all you > need to do is admit that there's no support, but word it carefully so > that it doesn't seem like a big deal. just give people the warm > fuzzies. that's all they're looking for. > > No, let's NOT talk to marketing people about this - all they care > about is making money by making stuff look nice and remove all the > wrinkles in photoshop! Kinda like the above are people on this list being *deliberately* obtuse or addled? the only point i was originally trying to make was that the current wording of no current commercial support found here: http://centos.org/modules/tinycontent/index.php?id=12 seemed, well, a bit abrupt and dismissive. even if there's no *official* commercial support, someone can certainly be a bit more expansive on why. and what other options are. or *something*. as it stands, that page is little more than "this page under construction," which might not inspire readers with confidence. have i clarified the point i'm trying to make? because, seriously, if you're still too clueless to get what i'm trying to say, then please save everyone the pixels and don't waste any more of your time or mine. i was *trying* to be helpful. rday p.s. what also doesn't inspire readers with confidence is obvious grammatical errors: "booking marking it will be of no value." ^^^ ^^^ *you* might not care about proper english, but others who are considering adopting centos might be put off by that. occasionally, you *do* have to take off your geek hat and put on your marketing hat when it comes time to promote your product. -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Linked In: http://www.linkedin.com/in/rpjday Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] link to "commercial support" page isn't really helpful
On Mon, 22 Jun 2009, Spiro Harvey wrote: > > from a promotional standpoint, i would avoid getting into that > > centos is a volunteer effort, and i would *seriously* avoid using > > the word "difficulty." all i was suggesting earlier is that there > > are a > > What? You'd prefer we lie to people? ok, this is getting frustrating. no, you don't lie about that. *of course* you have to describe centos as a volunteer project. but that bit of information is *not* *relevant* on the alleged *support* page, unless it directly affects how you're describing how to get support. otherwise, since you've already described the volunteer aspect of centos on something like a "what is centos?" page, there is no need to repeat it elsewhere. here, let me make a suggestion. get someone with a marketing background to peruse centos.org. ask for their honest opinion. and take it from there. rday ================ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Linked In: http://www.linkedin.com/in/rpjday Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] link to "commercial support" page isn't really helpful
On Mon, 22 Jun 2009, Karanbir Singh wrote: > On 06/22/2009 12:32 AM, Robert P. J. Day wrote: > >again, no, i'm *not* the right person. i'm not a centos > > developer and, therefore, i have no idea what options the > > developers might be looking at in terms of support channels. > > lets assume for a minute, that there is no real 'endorsement' or > 'commercial support venue' that the CentOS developers are > considering - What would then be the reasons to choose CentOS ? i may not have time to address this a lot more this evening as i'm hanging out at logan airport waiting to board my plane. but don't conflate the two issues here. the first issue is: why choose centos? and i can certainly address that. it's easy to show that it's a good product and why. i have no difficulty with that. the second (separate) issue is: where does one get centos support? and i *don't* know how to answer that. a previous poster listed a number of places: wiki, mailing lists, IRC. which is all well and good, but will mean *nothing* to a large company whose only concern is: "if something goes horribly, horribly wrong, who do i call to demand to fix it?" that's all they care about -- someone to yell at. they're not going to accept that they should start joining mailing lists or hanging out on IRC chats. i can say that *i* could try to handle it, but a suitably large company won't find that acceptable. they'll probably want something more substantial in the way of support. anyway, i'm starting to repeat myself so i'll give it more thought and see what else i can come up with. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Linked In: http://www.linkedin.com/in/rpjday Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] link to "commercial support" page isn't really helpful
On Sun, 21 Jun 2009, William Warren wrote: > if you are going to be the consultant and you are recommending > Centos then you are definitely a good person to make a suggestion as > to what should go in there. Take a whack at it. again, no, i'm *not* the right person. i'm not a centos developer and, therefore, i have no idea what options the developers might be looking at in terms of support channels. i have an extensive red hat/fedora background so i can certainly address the *quality* of the product. but if a client wants to know what might be backing *me* up in terms of support from the community or from commercial entities, i simply don't know. rday -- ================ Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Annoying Kernel Pedantry. Web page: http://crashcourse.ca Linked In: http://www.linkedin.com/in/rpjday Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
