[CentOS] [SPAM] Employee Needed
Hey guys we are looking for an addition to our very small sys admin team. We want somebody who either knows the [O/S, server, network, storage arena inside out] OR [systems automation (chef, puppet), virtualization, python, ruby]. Either slot filled would allow me to focus more on the other. Please head over to: http://www.rayjobs.com/index.cfm?NavID=103 And search with this job req: 17135BR It's with Raytheon but I can assure it resembles nothing even close to Raytheon. Very startup culture very exciting work. Relocation assist. provided if you think you are a seriously bad ass SA please reach out to me. -- Scott McClanahan W: 321-253-7892 ___ 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 09/17/2010 03:39 AM, Robert P. J. Day wrote: (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 I've done quite a few things. Recently, I just run puppet and let it do EVERYTHING for whatever a system might need. But things I have done in the past are autodetect if the system is a vm and install vmware-tools, find the next ip address available in DNS for the particular subnet the newly installed system is in and dynamically update forward and reverse (including a helpful TXT record which fit a known convention), run yum update and reboot, and even create a qtree on netapp automatically. Just a quick few things.. I also do some stuff during pre installation like align the disk on proper boundaries and enable software raid according to the meta data associated with the system record in cobbler. Cobbler is nice as a subscription means to dynamically alter kickstart configs so I can add 'raid=5' as meta data for instance the the vm will build itself with raid5 (if it can of course). Same things applies to selinux, firewall, and other features that need to be enabled very early on and puppet just checks to make sure it's still true. I've moved away from doing stuff in post install and instead let puppet handle pretty much everything. API's are great for this. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Partition alignment
On Tue, 2009-11-10 at 02:33 -0800, John Doe wrote: From: Scott McClanahan smcclana...@sigovs.com I'd like to use cobbler for dynamically creating kickstart scripts and wasn't sure if I could align my disk during install some how. Are there kickstart arguments to force the alignment on a 4k boundary? Have any of you had to do this? Personaly, I run a pre_kickstart script that partition and format the volumes as I want. Then I just use --onpart and --noformat in the kickstart. JD I suspect this is what I'll be doing as well. Seems easy enough. Thanks. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Partition alignment
I'll be setting up a vSphere 4 environment hosting CentOS 5.4 on Netapp FAS and was curious how you guys are handling the automation of partition alignment within your linux guests. I'd like to use cobbler for dynamically creating kickstart scripts and wasn't sure if I could align my disk during install some how. Are there kickstart arguments to force the alignment on a 4k boundary? Have any of you had to do this? Thanks. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] IO statistic Centos 5.4
On Fri, 2009-10-23 at 09:35 -0300, Sergio Belkin wrote: Hi, Has kernel-2.6.18-128.1.1 support for IO statistic for example when using pidstat -d? Thanks in advance! Is pidstat available in the 5.4 sysstat package or are you deviating from the stock sysstat package? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] [Slightly OT] Data Preservation
On Fri, 2009-10-02 at 13:15 -0700, John R Pierce wrote: ML wrote: HI All, So I have 5 1U servers (running Windows) that have Ultra 320 SCSI Drives in them. The owner of these boxes wants the drives captured in their current states to .iso or .cdr or something where if the need arises the data can be viewed, used again, etc. So what is the best approach? Boot from a Live CD, hook up a USB external HD and do what? Can I create a .iso or .cdr (or some other portable format) and have it created on the external USB? Thoughts on this process would be appreciated. Maybe not the right tool for the job but I always like using physical-to-virtual tools for archiving installed images. It frees up the hardware for me and I can have access to the data if I need it again by spinning up the VM. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] [Slightly OT] Data Preservation
It's still a one-way trip, though, where with clonezilla you can restore back to the hardware. Exactly. Once I do this type of operation I've made the decision that the OS will never need to run on physical hardware again. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] [OT] Conference room software
We have a very decentralized user base with no standard operating system or utilities except for a web browser of some kind (no Exchange either). What recommendations does the list have for software to coordinate conference room reservations? It doesn't need to be responsible for any kind of invitations or email notifications, really just a pretty calendar where scheduled events can go. It will first be used for reserving conference rooms but eventually could be used for more. Basically, a web application that can run on whatever web container installs on linux which supports shared calendars. Google calendar behind the firewall :) ... any suggestions? Thanks. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] ntp time server
Not knowing what country your from but at a U.S. taxpayer I have no reservations about using time.nist.gov myself, some people think it's rude to directly query stratum 1 servers. I typically have 2-3 NTP servers per location behind a load balancer and my internal servers sync against the load balanced VIP, and the NTP servers themselves sync against time.nist.gov nate I'm not trying to hijack this thread but I have a question about how typical this is for *core* infrastructure services. Do you load balance other services as well? I'm thinking of dns, ldap, proxy, internal web servers like a cms, radius, and probably more but those are some of the services I try to make fault tolerant. Thanks. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] authentication loosely tied to active directory?
Same here - which is why I raised the question. Although I probably could get permission to join the domain I want to be able to add users on the Linux side that don't exist in AD. Pam_smb works but I think something that used LDAP would be better if the ldap server could have local entries and proxy for the AD. The strategy I took was far from best practices in my opinion but was really the best solution for us at the time we needed it (including AD licensing costs and several disparate facilities across the country). I have all of my servers use the pam_ldap module in addition to setting my nsswitch.conf to use ldap. Accounts in my openldap server which also exist in AD and which I would like to authenticate against use a local saslauthd daemon to support kerberos5 to our AD infrastructure. Accounts which do not exist in AD and I don't want them to are added to openldap as well but because of the value of the userPassword attribute they use local authentication instead of passing the request to saslauthd. Basically, I only use AD for authentication (SSO) when needed (typically for humans) and openldap for universal daemon accounts or other ancillary type accounts (plus rfc2307 type NIS data). Modifying the AD schema to support rfc2307 was not an option at the time either. This is far from elegant because many ldap attributes must be duplicated and made consistent in both AD and openldap but it has worked out quite well for us. The more sophisticated overlays weren't available to us when we rolled this out and I wasn't really familiar with any solid and free meta directory servers. I wonder if I could have done something with referrals for the ldap attributes that are duplicated... or does anyone recommend a solid and free meta directory server? Hope this helps someone. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] [OT] DR
I remember a thread many months ago where someone asked about a disaster recovery template or guide and several people on this list linked some really good content. I can't seem to find that thread now and neglected to make note of the links but I do recall that some of the guides came from a site that had many other industry best practices type guides. Any insight here or do you need more info? Thanks. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] [OT] Network switches
A 3548 is only layer 2 anyway, i.e. ethernet switching, i.e. below IP... A model sometimes confused with the 3548 is the 3550-48, the 48x100M member of the 3550 series that replaced the 3500 series and as such the 3548, which does have layer 3 functionality in the EMI releases, it's pretty good too with wire speed forwarding even when using some of the layer 3 featureset... But, it won't do any layer 3 IPv6 stuff as some of the tricks used to get the speed include having certain functions done with dedicated silicon which can't cope with IPv6 and of course can't be upgraded with firmware (some versions of firmware have claimed some IPv6 support, but, I've not seen any success with it) d I'm the OP in case you've forgotten since this thread has been so active but just wanted to say thanks to everyone for the feedback! On the subject of layer 3 switching, it's an absolute must for us. IPv6 is not important at all to us. I, as the admin, care most about manageability, servicability (not sure if that's a word), and security. I'll probably rule out anything that doesn't offer at least 48 ports of 10/100/1000, ssh, port mirroring or spanning sessions, snmp, unique spanning trees per vlan, and something like vrrp. It would be nice to have 802.3ad (I think that's the right one) capability to do some link aggregation between the switches as well. Not really asking for anything in this post but just providing more information in case you're interested. Thanks again. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] [OT] Network switches
I'm looking to acquire a few new core switches for our network which would be a major upgrade from the cheap unmanaged things we currently have. Basically, just users, servers, and other simple network devices will be plugged into them but I'd like to start doing some testing with iSCSI for various non-production reasons. I have no allegiance to a particular vendor although I do have a Cisco background. I'd like them to be at least 10/100/1000 (no need for power over ethernet) and include many of the features that are most important to me in a managed switch, including: * vlans * mstp or some well established form of per vlan spanning tree * acl's * port mirroring or what cisco calls span sessions * snmp * ssh enabled remote management * support w/ updates and bugfixes I need at least 48 ports per device and obviously would like them to be fast. Most importantly, I'd like to know what you guys prefer as operations dudes and what pitfalls to avoid. Also, are there other features you folks would demand to have in your switches that I haven't mentioned? I can provide more information if you'd like. Thanks. Oh, cost is sort of an issue (small/medium sized business) but right now insight from you guys is what's important and I can work out the cost issue later. Thanks again. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] cisco netflow analyzer?
i've been pretty impressed with nfsen. took a little bit of fiddling to figure out, but lets me drill down into things pretty well. Seconded. nfsen is awesome. Bit of a learning curve, but extremely powerful once you get the hang of it! You can also use iptables and the ULOG target to generate flow information from your Linux boxes and send the output to nfsen/nfcapd as well! Ray I'm not trying to hijack this thread but do you find any significant overhead involved with using the ULOG target or packet loss in your statistics? Would you have a ULOG target very early on in your FORWARD filter to log all packets? Do those packets go to a ulogd instance and then to disk (rrd to limit disk usage) for nfsen to use? I'm concerned with losing packets in my current ntop configuration (not using pf_ring) and am looking at less obtrusive alternatives like gulp or ulog to first get ALL of the packets and with as little overhead as possible move that data to a location where analysis can happen using ntop or nfsen. Thanks. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] BiND Failover
On Fri, 2009-02-20 at 15:36 +0100, Per Qvindesland wrote: Hi All Thanks for all your answers, I agree it would be better with heartbeat then to mock around with dns and a very slow update time. Regards Per Qvindesland Another benefit is that failover occurs much more quickly when using a floating IP managed with heartbeat compared to using multiple server listings in your clients dns and ldap config files. The default timeout for EACH lookup is killer (if not using client side caching) when the first server is down and the responses must come from the second one in the list. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] LDAP and expired passwords
On Fri, 2008-10-31 at 16:32 -0400, Steve Thompson wrote: CentOS 5.2 with OpenLDAP 2.3.27, nss_ldap_253.13, using TLS, i686 and x86_64. LDAP password information update failed: Referral If I comment out ssl start_tls, the referral to the master is followed and the password change operation succeeds. I've found references to problems with earlier releases of pam_ldap when referrals were not properly followed when using TLS, and these are supposed to be fixed; apparently not in my case. Can anyone hit me with the clue stick? Does the common name in the certificate or the x509 v3 extensions match the hostname used in the referral in your slapd.conf? Is the certificate issued by the ldap server you are being referred to signed by a trusted CA? Following referrals using start_tls works just fine for me. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] device driver useage
On Thu, 2008-10-23 at 13:22 +0200, Geoff Galitz wrote: Under Centos 5.X, how can I determine with 100% certainty what driver is associated with a given device other than referencing dmesg? For example, what tool can I use to tell for sure what driver is attached to my eth0 device? One way is to crawl the sys file system. On one of my systems the driver can be seen by viewing the target in the /sys/class/net/eth0/driver link. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] [OT] VPN/DMZ best practices
There is such a wealth of knowledge and personal experience on this list that I'd like to get your opinions on our current situation. Currently, we have a simple tri-homed firewall with the internal network on one interface, the dmz on another, and the dirty internet on the last. Also, there is a spare interface on the box which is unused. We use CentOS and manually maintain our rule sets and routes since it's not really that complex. I'd like to setup a vpn connection between our office and a remote office, as well as, allow remote users to vpn into there desktops and map samba shares. I would prefer to tie in the openvpn software with our internal openldap server. Our dmz is currently not in use at all but will be soon, hosting our software. Having said all of this, what insights do you have for the following: 1. What are your recommendations for where the vpn (openvpn on linux) appliance should reside? In the dmz? Internally and configure the firewall to allow (and nat) vpn connections? On the unused interface in a different dmz than our hosting software? Somewhere else? 2. Should I abandon the single firewall approach and instead use two firewalls in a more traditional setup (gateway firewall - dmz - internal firewall)? If so, where should the vpn appliance go? I'll probably have more questions based on your answers and I look forward to the responses. Thanks. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] [OT] Firefox 3
This is completely off topic but just curious if you guys had any extra insight into what time today Firefox 3 will be released. Thanks. - scott ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
RE: [CentOS] [OT] Firefox 3
Sorry for the waisted disk space. Found it below. ftp://mozilla.isc.org/pub/mozilla.org/firefox/releases/3.0/linux-i686/en -US/index.html From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Scott McClanahan Sent: Tuesday, June 17, 2008 10:48 AM To: centos@centos.org Subject: [CentOS] [OT] Firefox 3 This is completely off topic but just curious if you guys had any extra insight into what time today Firefox 3 will be released. Thanks. - scott ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] sed
Not specific to CentOS but I know you guys would be really helpful anyhow. Basically, I have a file which has been editted in the past very similarly to the hosts file only now I want to use it as a hosts file and need to run some fancy sed to massage the data into shape. Currently, the data in the file is in the form of ip address tab short hostname space short hostname alias. In some cases there may not be any aliases so the end of line would be right after the short hostname (no space at the end either). In other cases there could be many space separated short hostname aliases. What I have been trying to do without success is add our domain name to the first string after the ip address and tab character. As an example, == Before == 1.1.1.1foo 10.10.10.10bar bar2 100.100.100.100foobar foobar2 foobar3 == After == 1.1.1.1foo.contoso.com 10.10.10.10bar.contoso.com bar2 100.100.100.100foobar.contoso.com foobar2 foobar3 Any advice on how to pull this off? Thanks. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] local root exploit
On Mon, 2008-02-11 at 10:45 -0800, Akemi Yagi wrote: On Feb 11, 2008 8:19 AM, Scott McClanahan [EMAIL PROTECTED] wrote: On Mon, 2008-02-11 at 04:52 -0800, Michael A. Peters wrote: Valent Turkovic wrote: I saw that there is a local root exploit in the wild. http://blog.kagesenshi.org/2008/02/local-root-exploit-on-wild.html And I see my centos box still has: 2.6.18-53.1.4.el5 yum says there are no updates... am I safe? Valent. The current kernel is 53.1.6.el5 If yum isn't seeing it - it probably needs to clean its cached headers. try: yum clean headers yum update kernel However - the 53.1.6.el5 release also is vulnerable, so you may as well wait for the exploit to be fixed before updating. I'm guessing CentOS will do it fairly quickly after rhel does. I understand that a known root exploit must be patched but I'm curious to know if we upgrade to the fixed kernel once released will it also include the degraded nfs performance discussed here: https://bugzilla.redhat.com/show_bug.cgi?id=431092 We have to wait and see, but my impression is that the nfs fix would not be in the updated kernel (I hope I am wrong). They are talking about getting it into 5.2 (even possibly into 5.3). I can see that this is a problem. Now, we can not stay with 53.1.4 on the systems where the local root exploit is a serious problem. Akemi Akemi Yes, until now we had no problem stalling on 53.1.4. I guess we'll have to test how badly the nfs performance degradation actually is under a heavy load in our environment. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] local root exploit
On Mon, 2008-02-11 at 04:52 -0800, Michael A. Peters wrote: Valent Turkovic wrote: I saw that there is a local root exploit in the wild. http://blog.kagesenshi.org/2008/02/local-root-exploit-on-wild.html And I see my centos box still has: 2.6.18-53.1.4.el5 yum says there are no updates... am I safe? Valent. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos The current kernel is 53.1.6.el5 If yum isn't seeing it - it probably needs to clean its cached headers. try: yum clean headers yum update kernel However - the 53.1.6.el5 release also is vulnerable, so you may as well wait for the exploit to be fixed before updating. I'm guessing CentOS will do it fairly quickly after rhel does. I understand that a known root exploit must be patched but I'm curious to know if we upgrade to the fixed kernel once released will it also include the degraded nfs performance discussed here: https://bugzilla.redhat.com/show_bug.cgi?id=431092 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: tail command
On Mon, 2008-02-04 at 14:09 -0800, Scott Silva wrote: on 2/4/2008 1:56 PM Scott McClanahan spake the following: In centos 4 we used tail in the following way: tail +83 file That would tail the contents of the file starting at line 83. In centos 5 that same command complains about the file +83 not being found. It appears that the + option in tail doesn't work the same way in centos 5. Is there another easy way to grab the contents of a file starting at a certain line number and beyond. I think it would be tail -n +83 file Ahh, yes. Because it can be a line count or byte count. The -n wasn't necessary in the old coreutils. Thanks alot. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] tail command
In centos 4 we used tail in the following way: tail +83 file That would tail the contents of the file starting at line 83. In centos 5 that same command complains about the file +83 not being found. It appears that the + option in tail doesn't work the same way in centos 5. Is there another easy way to grab the contents of a file starting at a certain line number and beyond. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] HA software advice
I neglected one obvious detail, this will running on 32 bit CentOS 5.1. On Wed, 2008-01-23 at 15:51 -0500, Scott McClanahan wrote: We are in need of some very basic software that will give us the ability to swing an ip address from one host to another during controlled maintenance or host failure. For now the IP address will be the only resource that is shared and there will never be a need for shared storage. Eventually we may want to monitor processes for health (probably just read in pid file) and it would be great if the recommended software had this ability as well but not completely necessary. The process monitoring part is just me trying to think ahead but it definitely wouldn't be needed in the near future. Ideally, this should be light weight user land code that hopefully already comes easily with the distribution :) Any suggestions? Thanks. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] HA software advice
On Wed, 2008-01-23 at 22:20 +0100, Tomas Ruprich wrote: yum install heartbeat Very robust, very reliable, easy to configure, easy to use :-) We use it for almost every critical server for about 3 years without any problem. http://www.linux-ha.org/ Tomáš Ruprich [EMAIL PROTECTED] DCD IICT MUAF Brno www.mendelu.cz, is.mendelu.cz tel.: +420 545 132 885, +420 602 127 744 [EMAIL PROTECTED] I had originally considered heartbeat but just didn't know if version 2 was overkill. It's a pretty capable package and I just didn't want to get in over my head for this project. Is version 2 still pretty simple if you want it to be? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] tick_divider
Just installed CentOS 5.1 on VMware ESX and am attempting to play with the newly added tick_divider feature. It doesn't seem to be making any difference in the number of timer interrupts though. I set tick_divider=10 which should reduce the number of timer interrupts to 100. I wrote a nasty little scripts that queries /proc/interrupts every 1 second and still see an increase each second in about 1000 interrupts. The server is: uname -srvmpio Linux 2.6.18-53.1.4.el5 #1 SMP Fri Nov 30 00:45:16 EST 2007 i686 i686 i386 GNU/Linux Obviously not running 64bit. Only one cpu has been allocated to this vm. Has anybody else used this successfully? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] weird load values
On Thu, 2007-12-06 at 16:48 +0100, Tomasz 'Zen' Napierala wrote: Wednesday 05 December 2007 15:39:41 J. Potter napisał(a): Hi List, I'm stumped by this: load average: 10.65, 594.71, 526.58 We're monitoring load every ~3 minutes. It'll be fine (i.e. something like load average: 2.14, 1.27, 1.03), and then in a single sample, jump to something like the above. This seems to happen once a week or so on a few different servers (all running in a similar application). I've never seen the 1 minute sample spike as high as the 5 or 15 minute samples. Seeing as that last value is a 15 minute period, well, it doesn't seem possible that one can have a 500+ 15 minute sample without having observed a spike in the 5 minute sample at least 5 minutes before. Also, there aren't 500+ processes on these systems -- it's typically around 100 total processes (ps auxw | wc -l). (Is there a way to see the total count of kernel-level threads?) Thoughts? As mentioned before, IO could give such strange results. I suggest launching dstat with logging to a file, and analyzing the file afterwards. What about using sar to report the previous run queue history. AFAIK the run queue figures don't include processes in an uninterruptable sleep state (disk IO). ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] A special kernel for linux as guest os
On Thu, 2007-09-20 at 15:46 -0700, Akemi Yagi wrote: On 9/20/07, Yuji Tsuchimoto [EMAIL PROTECTED] wrote: Dear Yagi-san, I heard from the horse's mouth that the CentOS team is working on the 100Hz centosplus kernel. I think your request triggered the action :-) They want make people happy. That sounds nice! This TIPS, CONFIG_HZ=100, is one of FAQs. It will make most of us happy. Now we can get kernel-vm package on dev.centos.org. Is it a test release of the special kernel? I installed the kernel-vm. Its change-log shows HZ=100. And the kernel seems better for clock interval on VMWare. Thanks a lot. Yuji Tsuchimoto-san, Yes, they are in testing. Some of us have been running the 100HZ kernel for more than 2 months and have not seen any problem so far. If you wish to know more details about the development of the virtualization-optimized kernel, please take a look at: http://bugs.centos.org/view.php?id=2189 And feel free to add any comments you have on that report. Akemi ___ Will the only deviation from the base/updates kernels be the decreased number of timer interrupts? Thanks. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] grep
On Tue, 2007-08-28 at 10:08 -0400, Stephen Harris wrote: Not a CentOS specific question, although I am running grep on CentOS 4.3 but how would you grep out a series of lines in a file starting at a specific point. For instance, if I have a file named foo and I want to grep out the next 5 lines after the first and only instance of the string bar how could I pull that off? Thanks so much. What do you mean by grep out ? Do you want to display those lines, or skip those lines? Do you want to see the bar line? Is that included in the 5 lines? Anyway, you probably want to use sed here, rather than grep. I'd like to skip those lines. I'd like to skip the line with bar and the following five lines. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] grep
On Tue, 2007-08-28 at 10:27 -0400, Stephen Harris wrote: On Tue, Aug 28, 2007 at 10:13:00AM -0400, Scott McClanahan wrote: On Tue, 2007-08-28 at 10:08 -0400, Stephen Harris wrote: Not a CentOS specific question, although I am running grep on CentOS 4.3 but how would you grep out a series of lines in a file starting at a specific point. For instance, if I have a file named foo and I want to grep out the next 5 lines after the first and only instance of the string bar how could I pull that off? Thanks so much. What do you mean by grep out ? Do you want to display those lines, or skip those lines? Do you want to see the bar line? Is that included in the 5 lines? Anyway, you probably want to use sed here, rather than grep. I'd like to skip those lines. I'd like to skip the line with bar and the following five lines. Like this? $ cat xx line 1 line 2 line bar line after 1 line after 2 line after 3 line after 4 line after 5 line after 6 line after 7 $ sed '/bar/,+5d' xx line 1 line 2 line after 6 line after 7 Beautiful man! Hats off. I've never used sed like that but I'll surely remember that one. Thanks from everybody. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] grep
Not a CentOS specific question, although I am running grep on CentOS 4.3 but how would you grep out a series of lines in a file starting at a specific point. For instance, if I have a file named foo and I want to grep out the next 5 lines after the first and only instance of the string bar how could I pull that off? Thanks so much. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
