Re: I need to add something to my global PATH

[prmarino1]

I usually use /etc/profile.d/ my self

  Original Message  
From: ToddAndMargo
Sent: Friday, January 13, 2017 21:20
To: scientific-linux-users@fnal.gov
Subject: Re: I need to add something to my global PATH

On 01/13/2017 06:13 PM, jdow wrote:
> On 2017-01-13 17:42, ToddAndMargo wrote:
>> Hi All,
>>
>> Google is failing me here. All I get is how to alter the path locally.
>>
>> I want to add something to the PATH so the EVERYONE see it.
>
> Edit /etc/profile
>
>> And one I make the changes, how do I reload the thing without having 
>> to reboot?
>
> That's easy, logout and log back in.
>
> So far as I know you can't do this without the logout. /etc/profile is 
> read on login. Changing an existing bash instance seems to require 
> manually fiddling with the PATH environment setting inside the running 
> bash instance.
>
> {^_^}

Thank you! I used pathmunge inside profile

-- 
~~
Computers are like air conditioners.
They malfunction when you open windows
~~

Re: Perl 6 just hit

[prmarino1]

By the way I know for a fact that on their big deployment contracts Cisco does 
not use their own products to manage their switches. They actually use Perl 
scripts.

  Original Message  
From: Steven Haigh
Sent: Friday, December 30, 2016 04:11
To: scientific-linux-users@fnal.gov
Subject: Re: Perl 6 just hit

On 30/12/16 20:04, prmari...@gmail.com wrote:
> What you will here is Perl is dead, but the truth is most people use it on a 
> daily basis and don't know it. Perl is still the swiss army chainsaw of 
> scripting languages.

If you do an online transaction - somewhere between you and your bank,
you hit a perl script.

It's been said that the next financial crisis will be triggered by a
perl bug.

Even more seriously, stuff that absolutely must work, all the time,
every time and for more than a year at a time is written in perl.

Billion of dollars a month get moved around with perl scripts - and that
won't change anytime soon...

-- 
Steven Haigh

Email: net...@crc.id.au
Web: https://www.crc.id.au
Phone: (03) 9001 6090 - 0412 935 897

Re: Perl 6 just hit

[prmarino1]

By the way. If you would like I can happily send you a brief reading list ‎if 
you want to get started with Perl 5. I just need to know if you already know 
any other languages so I can send you the right list. For example if you are 
already a C++ programmer you only need to read 1 very short book and a couple 
of pages on the Perl web site to update what's changed since it was published. 
If you don't have programing experience then the list gets longer

  Original Message  
From: prmari...@gmail.com
Sent: Friday, December 30, 2016 04:04
To: Maarten; SCIENTIFIC-LINUX-USERS@fnal.gov
Subject: Re: Perl 6 just hit

Ok well I will try to be unbiased but full disclosure I am a real hard core 
Perl programmer and I admittedly am not a huge Python fan.
Both have their good and bad points.
‎
The python philosophy is to enforce good programing practices by enforcing 
indentation.‎
‎
The Perl philosophy it there are many ways to do it.‎
‎
A little bit of a primer one of  the biggest motivation of the original writer 
of Python was he hated how sloppy Perl programmers  were and wanted to create a 
language that enforced what he thought were good coding practices. By the way 
any one who disagrees a quick google search for linux journal articles circa 
2001 can back me up with his own words.

The truth is ‎I've seen good and bad code in both languages. An enforcing 
indentation doesn't help especially when the the interpreter can't tell the 
difference between a tab and the equivalent number of spaces on that platform.

Perl got an image Problem thanks to a 2002 April fools joke by Larry Wall the 
writer of the language which oddly back fired on him. He announced Perl 6 was 
the new Perl engine which would also be able to run code in a VM in any other 
language. He also created a code repo for it. A couple of days later he was 
shocked to find working code in the repo. So he rolled with it and started to 
put together extremely ambitious specs for Perl 6. Now Perl should have gone 
through several major releases since then but because of the lofty goals of 
Perl 6 it didn't. That's not to say the language has been static. No Perl 5 
program I've written in the last 10 years will not run on a version of Perl 5 
from 2002 or even in most cases a version from 2005. To People who know the 
language well what we are calling Perl 6 should probably be called Perl 9.

As for Python it's become popular and definitely Red Hat's favorite scripting 
language. It's got a great following and is used for many things.

As for modules Perl 5 still has more but many of the are dated, Python is 
catching up and it has the benefit of youth and popularity.
For example Amazon AWS has a Python API, but not a Perl API. I've been debating 
about writing one my self and in the Perl tradition there are 2 ways I can do 
it build on LWP (lib WWW Perl) to create a native Perl module, or take the lazy 
route by create an "XS" module which wraps the C API. The advantage of the XS 
method is I can run a script and have a clumsy but working module in seconds, 
then spend a couple of hours to make it easy to use.

What you will here is Perl is dead, but the truth is most people use it on a 
daily basis and don't know it. Perl is still the swiss army chainsaw of 
scripting languages.

Honestly for support on learning Python is easier.
With Perl if you can get to the point where you really understand the power of 
anonymous references, it's still a very fast and flexible language.

In conclusion
Either one is good. Learn them both at least superficially. Tinker and play 
with them and see which one is right for you.



  Original Message  
From: Maarten
Sent: Friday, December 30, 2016 03:00
To: SCIENTIFIC-LINUX-USERS@fnal.gov
Subject: Re: Perl 6 just hit

Hello,

Saw this discussion and found it interesting, got a somewhat half on 
topic question. I've been trying to decide on a language to learn, 
python and perl both stood out. There seems to be various discussions of 
why one is better than the other, and the pro's and con's of both. From 
what I've seen perl has been around longer than python and there are 
plenty of places to ask for help and lots of perl modules to use in your 
code. Python on the other hand seems newer, also has modules(probably 
less than perl), and has quite bit of community around too. However 
lately I've been seeing that there are more python projects than perl, 
making me think python might be the better one to go for. So I am more 
wondering what peoples opinions on this mailing list are when it comes 
to python or perl, that way I can consider the opinion of people who 
have been programming for a while before I make a decision to what I am 
going to do ;)

On 2016-12-30 02:03, prmari...@gmail.com wrote:
> I couldn't agree more, usually when I go to an open source event if
> the crowd is a good one they wind up going some where else after the
> event is over and chat for hours.
> Thanks for the links, I'll look into them 

Re: Perl 6 just hit

[prmarino1]

Ok well I will try to be unbiased but full disclosure I am a real hard core 
Perl programmer and I admittedly am not a huge Python fan.
Both have their good and bad points.
‎
The python philosophy is to enforce good programing practices by enforcing 
indentation.‎
‎
The Perl philosophy it there are many ways to do it.‎
‎
A little bit of a primer one of  the biggest motivation of the original writer 
of Python was he hated how sloppy Perl programmers  were and wanted to create a 
language that enforced what he thought were good coding practices. By the way 
any one who disagrees a quick google search for linux journal articles circa 
2001 can back me up with his own words.

The truth is ‎I've seen good and bad code in both languages. An enforcing 
indentation doesn't help especially when the the interpreter can't tell the 
difference between a tab and the equivalent number of spaces on that platform.

Perl got an image Problem thanks to a 2002 April fools joke by Larry Wall the 
writer of the language which oddly back fired on him. He announced Perl 6 was 
the new Perl engine which would also be able to run code in a VM in any other 
language. He also created a code repo for it. A couple of days later he was 
shocked to find working code in the repo. So he rolled with it and started to 
put together extremely ambitious specs for Perl 6. Now Perl should have gone 
through several major releases since then but because of the lofty goals of 
Perl 6 it didn't. That's not to say the language has been static. No Perl 5 
program I've written in the last 10 years will not run on a version of Perl 5 
from 2002 or even in most cases a version from 2005. To People who know the 
language well what we are calling Perl 6 should probably be called Perl 9.

As for Python it's become popular and definitely Red Hat's favorite scripting 
language. It's got a great following and is used for many things.

As for modules Perl 5 still has more but many of the are dated, Python is 
catching up and it has the benefit of youth and popularity.
For example Amazon AWS has a Python API, but not a Perl API. I've been debating 
about writing one my self and in the Perl tradition there are 2 ways I can do 
it build on LWP (lib WWW Perl) to create a native Perl module, or take the lazy 
route by create an "XS" module which wraps the C API. The advantage of the XS 
method is I can run a script and have a clumsy but working module in seconds, 
then spend a couple of hours to make it easy to use.

What you will here is Perl is dead, but the truth is most people use it on a 
daily basis and don't know it. Perl is still the swiss army chainsaw of 
scripting languages.

Honestly for support on learning Python is easier.
With Perl if you can get to the point where you really understand the power of 
anonymous references, it's still a very fast and flexible language.

In conclusion
Either one is good. Learn them both at least superficially. Tinker and play 
with them and see which one is right for you.



  Original Message  
From: Maarten
Sent: Friday, December 30, 2016 03:00
To: SCIENTIFIC-LINUX-USERS@fnal.gov
Subject: Re: Perl 6 just hit

Hello,

Saw this discussion and found it interesting, got a somewhat half on 
topic question. I've been trying to decide on a language to learn, 
python and perl both stood out. There seems to be various discussions of 
why one is better than the other, and the pro's and con's of both. From 
what I've seen perl has been around longer than python and there are 
plenty of places to ask for help and lots of perl modules to use in your 
code. Python on the other hand seems newer, also has modules(probably 
less than perl), and has quite bit of community around too. However 
lately I've been seeing that there are more python projects than perl, 
making me think python might be the better one to go for. So I am more 
wondering what peoples opinions on this mailing list are when it comes 
to python or perl, that way I can consider the opinion of people who 
have been programming for a while before I make a decision to what I am 
going to do ;)

On 2016-12-30 02:03, prmari...@gmail.com wrote:
> I couldn't agree more, usually when I go to an open source event if
> the crowd is a good one they wind up going some where else after the
> event is over and chat for hours.
> Thanks for the links, I'll look into them even though I'm on too many
> mailing lists already‎ :).
> 
>   Original Message  
> From: ToddAndMargo
> Sent: Thursday, December 29, 2016 18:24
> To: Paul Robert Marino
> Cc: scientific-linux-users@fnal.gov
> Subject: Re: Perl 6 just hit
> 
> On 12/28/2016 01:09 PM, Paul Robert Marino wrote:
>> there is one for active Perl 6
>> projects but they don't want any one who doesn't already have an
>> active Perl 6 project to attend. I asked them very politely for a
>> clarification on their policy and didn't not get a response. I didn't
>> get a reply but I know other Perl 5 programmers who showed up looking
>> to 

Re: Perl 6 just hit

[prmarino1]

I couldn't agree more, usually when I go to an open source event if the crowd 
is a good one they wind up going some where else after the event is over and 
chat for hours.
Thanks for the links, I'll look into them even though I'm on too many mailing 
lists already‎ :).

  Original Message  
From: ToddAndMargo
Sent: Thursday, December 29, 2016 18:24
To: Paul Robert Marino
Cc: scientific-linux-users@fnal.gov
Subject: Re: Perl 6 just hit

On 12/28/2016 01:09 PM, Paul Robert Marino wrote:
> there is one for active Perl 6
> projects but they don't want any one who doesn't already have an
> active Perl 6 project to attend. I asked them very politely for a
> clarification on their policy and didn't not get a response. I didn't
> get a reply but I know other Perl 5 programmers who showed up looking
> to get porting tips, and were asked to leave because they weren't
> currently Perl 6 programmers, which is a very poor approach to take if
> you really want to rebuild the Perl community.

I have found in all my years in this biz that when so called "experts" get
arrogant and condescending, it is usually because they don't
know what they are doing. The real experts love to talk and talk
about what they have learned. Sort of like letting the air out
of a compressed air container.

There is a Perl 6 mailing list with a bunch of great guys
over at

http://lists.perl.org/list/perl6-users.html

-- 
~~
Computers are like air conditioners.
They malfunction when you open windows
~~

Re: Regarding latest Linux level 3 rootkits

[prmarino1]

Jdow,

Why are you looking at that‎ for root kit prevention?
It's a very old fashion approach, I would use the RPM's verify  command or one 
of the many filesystem  check sum tools available for that instead.
Either one can tell you if ‎any critical binaries or libraries have been 
compromised very easily and there are even tools built around them to do it on 
a network wide level.
Further more if you really want to make your systems resistant to root kits, 
readonly mount of / and /usr‎ is still your best bet, even Red Hat products 
like RHEV use that method on appliances.


  Original Message  
From: jdow
Sent: Wednesday, September 7, 2016 19:09
To: scientific-linux-users@fnal.gov
Subject: Re: Re: Regarding latest Linux level 3 rootkits

Thanks Vladimir,

I suppose I could pull the necessary files from busybox as a means of keeping a 
more generic Linux system in security trim. This might be a useful tool set to 
suggest upstream. A statically linked less would allow a quick check for the 
hidden user. A statically linked chkrootkit would find the bad file size for 
the 
affected glib libraries.

{^_^} Joanne

On 2016-09-07 03:36, Vladimir Mosgalin wrote:
> Hi jdow!
>‎
> On 2016.09.06 at 23:15:04 -0700, jdow wrote next:
>
>> Is there any source for a VI, VIM, or even EMACS that has all libraries
>> compiled into it statically? That would make monitoring for the rootkit much
>> easier. The same could be said for utilities such as chkrootkit. With
>> compiled in static libraries these level three (user space) rootkits can't
>> edit the results you get, as easily. (Any file system components in user
>> space would also have to be statically linked.)
>
> Busybox would work. It's usually build statically (either that, or it's
> easy to make that kind of build) and includes vi clone. Very poor man's
> vi, just like other busybox utilities, but nevertheless. Current version
> supports some neat stuff like autoindent and undo.
>

Re: No installation without dhcp active?

[prmarino1]

You need to define static IP's in darcut format ‎on the kernel boot command 
line now since 7. Look at the kickstart instructions for fedora for details.
Right or wrong the idea behind it is that with IPv6 ‎coming in the future every 
one should be using DHCP every where.
  Original Message  
From: Lamar Owen
Sent: Friday, August 26, 2016 18:20
To: Peter Boy; scientific-linux-us...@listserv.fnal.gov
Subject: Re: No installation without dhcp active?

Peter,

Did you solve your problem? I'm going to be doing an http install of 
CentOS 7 tomorrow on a subnet with no DHCP server, and I'll see where 
configuring the static IP is in the installer (I'm pretty sure I know 
where it is; there is a configure button on the Network & Hostname page 
of the installer, and configuring a static IP is done there).

On 08/14/2016 07:42 AM, Peter Boy wrote:
> Hi,
>
> I just tried to install a new Scientific 7 virtual host on my server using 
> virtlib remote and installing using html remote installation method.
>
> Everything went fine, the necessary files were loaded from the mirror server, 
> kernel booted, dracut started, but aborted because it didn’t receive a dhcp 
> offer (according to log). There is no dhcp available in that environment 
> (Hetzner root server in Germany). With previous installation I remember the 
> installation started nevertheless and I could configure a static IP 
> configuration as part of the installation process. Unfortunately, I didn’t 
> found any opportunity to define a static IP prior to the installation process 
> aborting.
>
>
> How can I install ScientificLinux?
>
>
> Or is there another RedHat alike which lets me configure a static IP (CentOS 
> doesn’t either, by the way).
>
>
> Thanks
> Peter
>
>
>
>
>
> —
> Dr. Peter Boy
> Universität Bremen
> Mary-Sommerville-Str. 5
> 28359 Bremen
> Germany
>
> p...@zes.uni-bremen.de
> www.zes.uni-bremen.de
>
> 
>
> Are you looking for a web content management system for scientific research 
> organizations?
> Have a look at http://www.scientificcms.org
>


-- 
Lamar Owen
Chief Information Officer
Pisgah Astronomical Research Institute
1 PARI Drive
Rosman, NC 28772
828-862-5554
www.pari.edu

Re: Updates of samba4 ?

[prmarino1]

By the way if you have any support licenses with RedHat create a matching case 
with them too. The developers give higher priority to cases created by paid 
customers. 

  Original Message  
From: Rupert Kolb
Sent: Monday, June 6, 2016 17:27
To: scientific-linux-users@fnal.gov
Subject: Re: Updates of samba4 ?

Thanks for clarifying. I was not aware of this.

For the short term I downgraded to an older version of samba4 (to get my 
system running again).
(And yes, there is an entry in bugzilla for "my" problem. And a link to 
an upstream patch )

In the medium term I'm looking for an other distribution:
It doesn't make sense to have about 10 years of support (in theory), but 
updates just every half year.
Then I prefer a system
-- where I have to do upgrades to the next major versions more frequently,
-- because of merely about 3 years of update support,
++ but with a more current update policy
++ and an overall more recent software.

Rupert


Stephen John Smoogen schrieb:
> On 6 June 2016 at 13:00, Rupert Kolb  wrote:
>> Hi,
>>
>> are there any updates for samba4 ?
>> At the moment in the repo is:
>> samba4-4.2.10-6.el6_7.x86_64 from 13th of april.
>>
>> At download.samba.org is a updated version samba-4.2.12 from 2016-05-02 (one
>> month ago!)
>>
>> As there are some bugs in 4.2.10, which seem to be solved in 4.2.12 (for
>> instance: 'wbinfo -u' returns no users), I'm really interested in the
>> updated version !!!
>>
> You seem unfamiliar with how Scientific Linux ships software which is
> causing you some confusion. Scientific Linux (SL) is built from the
> git source code that Red Hat puts out for its Enterprise Linux (RHEL).
> Red Hat does periodic updates to its software on a scale of 1 to 2
> times a year but these upgrades may only backport fixes to the current
> release number or may do a complete upgrade. [When a RHEL release
> moves from various production stages which RHEL-6 just did, they only
> backport major fixes.]
>
> So if you need SL to ship samba4-4.2.12 then you need to check to see
> if there are existing bugs on the issues you need fixed in
> http://bugzilla.redhat.com and also test out whenever RHEL-6.9beta
> comes out to see if the bug was backported to it. Otherwise you may
> need to look at Scientific Linux 7 and if it is fixed/updated in SL7.3
>
>
>> Rupert

Re: What is this xfadump error?

[prmarino1]

It always uses the catalog, even though you are doing full dumps it updates the 
catalog so you can do incremental in the future.
It also knows where the backups were stored and where to restore them by 
default.


  Original Message  
From: ToddAndMargo
Sent: Sunday, May 15, 2016 04:16
To: scientific-linux-users@fnal.gov
Subject: Re: What is this xfadump error?

>> Original Message
>> From: ToddAndMargo
>> Sent: Saturday, May 14, 2016 20:37
>> To: scientific-linux-users@fnal.gov
>> Subject: What is this xfadump error?
>>
>> Hi All,
>>
>> $ rpm -qa \*xfsdump\*
>> xfsdump-3.1.4-1.el7.x86_64
>>
>> What is the meaning of this xfsdump error. There is
>> no /dev/sda on this system at the moment.
>>
>> # /usr/sbin/xfsdump -v verbose -M 1 -L 1 -l 0 -f
>> /lin-bak/2016-05-14_15-49-55_homeXfsDump /home
>>
>> /usr/sbin/xfsdump: dumping non-directory files
>> WARNING: Your hard drive is failing
>> Device: /dev/sda [SAT], unable to open device
>> /usr/sbin/xfsdump: ending media file
>> /usr/sbin/xfsdump: media file size 453262590208 bytes
>> /usr/sbin/xfsdump: dump size (non-dir files) : 453181559704 bytes
>> /usr/sbin/xfsdump: dump complete: 5404 seconds elapsed
>> /usr/sbin/xfsdump: Dump Summary:
>> /usr/sbin/xfsdump: stream 0 /lin-bak/2016-05-14_15-49-55_homeXfsDump
>> OK (success)
>> /usr/sbin/xfsdump: Dump Status: SUCCESS
>>
>>
>> And it succeeded!
>>
>> /home is on /dev/sdb3
>> /lin-bak is /dev/sdc1
>>
>> Really!
>>
>> # fdisk -l /dev/sda
>> fdisk: cannot open /dev/sda: No such file or directory
>>
>> Any idea?
>>
>> Many thanks,
>> -T


On 05/14/2016 09:58 PM, prmari...@gmail.com wrote:
> Sounds like your hard drive or the controller are having issues‎.
> By any chance is/var‎ on sda. XFSdump keeps a catalog in /var/lib/xfs which 
> is used for incremental backups.
> I know this because about 3 or 4 years ago I had to file a bug ticket with 
> Red Hat for RHEL 6 about improper selinux contexts on that directory.
>
>

Hi Rrmarino,

It is not an incremental dump. But  It is two removable
backups in a row. Due to this bug

https://bugzilla.redhat.com/show_bug.cgi?id=1257018

The backup drive mounts on /dev/sda the first time,
gets removed and the second drive mounts on /dev/sdc.
This error occurred on the second drive.

Maybe it is using this catalog?

-T


-- 
~~
Computers are like air conditioners.
They malfunction when you open windows
~~

Re: What is this xfadump error?

[prmarino1]

Sounds like your hard drive or the controller are having issues‎.
 By any chance is/var‎ on sda. XFSdump keeps a catalog in /var/lib/xfs which is 
used for incremental backups.
I know this because about 3 or 4 years ago I had to file a bug ticket with Red 
Hat for RHEL 6 about improper selinux contexts on that directory.


  Original Message  
From: ToddAndMargo
Sent: Saturday, May 14, 2016 20:37
To: scientific-linux-users@fnal.gov
Subject: What is this xfadump error?

Hi All,

$ rpm -qa \*xfsdump\*
xfsdump-3.1.4-1.el7.x86_64

What is the meaning of this xfsdump error. There is
no /dev/sda on this system at the moment.

# /usr/sbin/xfsdump -v verbose -M 1 -L 1 -l 0 -f 
/lin-bak/2016-05-14_15-49-55_homeXfsDump /home

/usr/sbin/xfsdump: dumping non-directory files
WARNING: Your hard drive is failing
Device: /dev/sda [SAT], unable to open device
/usr/sbin/xfsdump: ending media file
/usr/sbin/xfsdump: media file size 453262590208 bytes
/usr/sbin/xfsdump: dump size (non-dir files) : 453181559704 bytes
/usr/sbin/xfsdump: dump complete: 5404 seconds elapsed
/usr/sbin/xfsdump: Dump Summary:
/usr/sbin/xfsdump: stream 0 /lin-bak/2016-05-14_15-49-55_homeXfsDump 
OK (success)
/usr/sbin/xfsdump: Dump Status: SUCCESS


And it succeeded!

/home is on /dev/sdb3
/lin-bak is /dev/sdc1

Really!

# fdisk -l /dev/sda
fdisk: cannot open /dev/sda: No such file or directory

Any idea?

Many thanks,
-T


-- 
~~
Computers are like air conditioners.
They malfunction when you open windows
~~

Re: Anyone know of a bootable USB3 PCI or PCIe card?

[prmarino1]

Yes that is most likely your issue.
In theory I may have a work around for you‎. Although I have never tried it for 
this purpose.
This depends on your card a bit if you have a higher end USB3 PCI card then it 
will have an individual root hub for each port. In that case each one will show 
up in lspci.
If that is the case then you can try mapping the PCI address to the VM that 
might make it bootable for the VM with some low lever tinkering directly in the 
config.
The other thing is are you using a GUI to manage the config, if so you may find 
that this is an arbitrary limitation in the GUI and not in KVM it self. In that 
case you may be able to get it to work via the config file.

  Original Message  
From: Konstantin Olchanski
Sent: Tuesday, May 10, 2016 20:41
To: ToddAndMargo
Cc: scientific-linux-users@fnal.gov
Subject: Re: Anyone know of a bootable USB3 PCI or PCIe card?

On Tue, May 10, 2016 at 05:29:13PM -0700, ToddAndMargo wrote:
> 
> Any of you guys know of a bootable PCIe USB adapter
> that is bootable?
> 


Never seen such a thing. Had similar problem with non-bootable PCI SATA and 
GigE interfaces.

Not bootable because machine BIOS is too old and does not have a "driver"
for the newer chip on your board. So in order to be bootable, the PCI card would
have to have an EPROM/flash chip that contains the required BIOS bits.

This makes a bootable USB interface should be easy to identify by photograph -
in addition to the PCI<->USB bridge chip, it will have one more chip
for the BIOS.


-- 
Konstantin Olchanski
Data Acquisition Systems: The Bytes Must Flow!
Email: olchansk-at-triumf-dot-ca
Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada

Re: Perl window question

[prmarino1]

By window I assume you mean X11
In that case look at Perl/TK there are several great modules that can help you, 
that's the classic method although most people just do web interfaces now‎.
Also if you would like I could suggest some books to read that would help you a 
lot. 
I'm a pretty heavy Perl programmer my self and am always happy to help any one 
who wants to learn Perl.‎ 
One thing I will advise it seems pretty abstract at first but learn how 
anonymous references work in Perl because they are really the key to unlocking 
the true power of the whole language, I always consider it as the key piece of 
knowledge that separates Perl scripters from a Perl programmer.

  Original Message  
From: ToddAndMargo
Sent: Sunday, November 22, 2015 23:00
To: scientific-linux-users@fnal.gov
Subject: Perl window question

Hi All,

I am trying to teach myself Perl. I am also trying to
get away from Zenity.

Any of you guys have a favorite method of creating a
windows from Perl that is SL7 friendly (meaning the
modules are available)?

Many thanks,
-T

-- 
~~
Computers are like air conditioners.
They malfunction when you open windows
~~

Re: VMware

[prmarino1]

If you have slow video performance on KVM look into spice. Which is not 
included with SL but it's not hard to add.
Bridged networks are not hard to add to any of these solutions‎, unreliable 
WiFi can be though under all of them. If you want to make it more tolerant of 
such issues you have two options
1 open vswitch‎
2 create the bridge ‎manually in /etc/sysconfig/network-scripts and attach the 
wifi interface too it. Note that means that the dhcp client has to be attached 
to the bridge, and I don't know if Network Manager will work well for that 
configuration.‎

Your best bet with WiFi is to do NAT.

  Original Message  
From: Francesco M. Taurino
Sent: Wednesday, October 28, 2015 03:54
To: SCIENTIFIC-LINUX-USERS@fnal.gov
Subject: Re: VMware

hi yasha,

kvm windows 7/8/10 guests can be a bit slow in graphic applications, but 
quite usable
if you need cpu/memory raw power.

you can use virtualbox, and bridge the virtual lan card of your guest to 
a physical lan
or a wifi adapter. the wifi adapter must be fully connected on your 
linux host.

ftaurino

Il 27/10/2015 10:31, Karel Lang AFD ha scritto:
> Hi,
> just q. (i surely missed it in earlier conv.) - why can't you use KVM 
> as a virtualization layer?
>
> I use KVM on servers, workstations, laptops and i find it has all i need.
>
> I just missed thing like 'shared folder' between host/guest like eg. 
> vbox has, but this can be remedied by compiling/turning on the 9pFS in 
> kernel, if the 10Gbps of the NATed internal networking with virtio 
> driver is not enough.
>
>

Re: SL 7.2

[prmarino1]

The reason for the small /boot is since the introduction of dracut you can now 
use a shockingly small ‎kernel because the initrd is now customized to your box 
and less modules need to be compiled in too. That said that is a bit small but 
you can override it it just takes a lot of clicks.

As for gnome it's always been Red Hats favorite because they have had a heavy 
hand in developing it. It's never been easy ‎to override. That said I've done 
it with XFCE on rhel 7 and fedora so it's not impossible.
Further more if you are doing a lot of deploys you should be using kickstarts 
which give you far more control over the installation and guarantee consistency.

What it comes down to is 7 is a new beast with a big learning curve. You need 
to play with it and not worry about messing it up the first few time because it 
will happen.

  Original Message  
From: Konstantin Olchanski
Sent: Friday, July 3, 2015 22:10
To: Larry Linder
Cc: scientific-linux-users@fnal.gov
Subject: Re: SL 7.2

On Fri, Jul 03, 2015 at 10:43:52AM -0400, Larry Linder wrote:
 Dear Sir:
 
 6. We (everyone in the shop) unanimously hates the GENOME desk top. There 
 does not appear to be able to select an alternate.
 

Pretty cool! All my bases are belong to you! What did you use to generate this 
gibberish?

-- 
Konstantin Olchanski
Data Acquisition Systems: The Bytes Must Flow!
Email: olchansk-at-triumf-dot-ca
Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada

Re: nfsv4 and rpcidmapd

[prmarino1]

  If your using kerberos‎ then there may be some other issues.1) make sure that the default realm is set correctly in /etc/krb5.conf on all servers.2) make sure that all the processes have access to keytab files readable by the user the service is running as, and that it contains the key for the principal for that service. If not then user key forwarding for the users pricipal won't work correctly‎.From: Patrick J. LoPrestiSent: Tuesday, June 30, 2015 17:17To: Orion PoplawskiCc: Eve V. E. Kovacs; SCIENTIFIC-LINUX-USERS@fnal.govSubject: Re: nfsv4 and rpcidmapdPossibly related:https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+bug/526302Assuming you are using FQDNs and the host's domain matches the Kerberos domain, it sounds like you can simply comment out the "Domain = " line in idmapd.conf.(I vaguely recall "localdomain" having special meaning in this context and therefore being a bad idea. I always set it to something else. But I am unable to find a reference, so maybe my memory is playing tricks on me.)- PatOn Tue, Jun 30, 2015 at 1:47 PM, Orion Poplawski or...@cora.nwra.com wrote:On 06/30/2015 02:39 PM, Eve V. E. Kovacs wrote:
 Yes, kereberos is used for password authentication; account information is
 supplied by our ldap server. Passwords are not served via ldap.
 Eve


Perhaps something in that configuration is forcing the full domain to get
sent. Not sure. idmap issues always give me headaches.

 On Tue, 30 Jun 2015, Orion Poplawski wrote:

 Date: Tue, 30 Jun 2015 15:30:41 -0500
 From: Orion Poplawski or...@cora.nwra.com
 To: Eve V. E. Kovacs kov...@anl.gov, scientific-linux-users@fnal.gov
 Subject: Re: nfsv4 and rpcidmapd

 On 06/30/2015 01:46 PM, Eve V. E. Kovacs wrote:
 We have an SL6 nfsv4 file server and a number of SL6 clients.
 We were careful to configure idmapd.conf on both the clients and the server to
 have the same domain name as follows:

 # The following should be set to the local NFSv4 domain name
 # The default is the host's DNS domain name.
 #Domain = local.domain.edu
 Domain = localdomain

 All of this worked until recently.

 Now, when I try to change the ownership of my file 'test' on one of the
 clients, I get an error:
 chown: changing ownership of test : Invalid argument

 On the server, I see errors in the log file:
 rpc.idmapd[6092]: nss_getpwnam: name 'kov...@hep.anl.gov' does not map into
 domain 'localdomain'

 This problem has various solutions posted on the internet. Some solutions
 claim that all that is required is to have the same domain name on the client
 and server. We already have this, but still have a problem. Another solution
 suggests changing the local NFSv4 domain name to match the DNS domain name
 (which looks promising, given the error message above).

 Has anyone else had this problem and/or know the fix?

 I would definitely recommend using the real domain name, but it does seem like
 the client is sending the "hep.anl.gov" domain name rather than "localdomain",
 and I'm not sure why that would be if it is configured as you described.
 Either way *should* work. Is kerberos involved at all?


 --
 Orion Poplawski
 Technical Manager  303-415-9701 x222
 NWRA, Boulder/CoRA Office  FAX: 303-415-9702
 3380 Mitchell Lane   or...@nwra.com
 Boulder, CO 80301 http://www.nwra.com


 ***
 Eve Kovacs
 Argonne National Laboratory,
 Room L-177, Bldg. 360, HEP
 9700 S. Cass Ave.
 Argonne, IL 60439 USA
 Phone: (630)-252-6208
 Fax: (630)-252-5047
 email: kov...@anl.gov
 ***


--
Orion Poplawski
Technical Manager  303-415-9701 x222
NWRA, Boulder/CoRA Office  FAX: 303-415-9702
3380 Mitchell Lane   or...@nwra.com
Boulder, CO 80301 http://www.nwra.com

Re: how to add packages that are not in the repo?

[prmarino1]

Put them all in the same directory and yum should figure it out. If not then I 
think there was an option ‎called --assist or --aid for the rpm command which 
will do it but it's been a while.

Also remember to check /etc/cron.daily there is a yum autoupdate package that 
installs by default on 6 and bellow that runs a cronjob to run yum update -y 
every day you will want to either disable it or install the yum blacklist 
extension rpm‎ and configure it to prevent it from updating those packages.

Sent from my BlackBerry 10 smartphone.
  Original Message  
From: Tini
Sent: Friday, May 29, 2015 20:00
To: ToddAndMargo; SCIENTIFIC-LINUX-USERS@FNAL.GOV
Subject: Re: how to add packages that are not in the repo?

i forgot to ask, how do i get around the 'file dependency' problem? 
should i just add all of the libraries? :-D 

--- Original Message ---
From: ToddAndMargo toddandma...@zoho.com
To: t...@telekon.org, SCIENTIFIC-LINUX-USERS@FNAL.GOV
Subject: Re: how to add packages that are not in the repo?
Date: Fri, 29 May 2015

On 05/29/2015 02:31 PM, t...@telekon.org wrote:
 how can i add packages that aren't in the repo?

Hi Trin,

Go to pbone.net, find the package (rpm) you want to install.

Download the package.

switch to root and install the package
rpm -ivh package.rpm

If you can't find the package for SL on phone, then it
gets interesting.

What did you have in mind?

-T

Re: flash alternatives?

[prmarino1]

Why don't you complain to websites still using flash. Send them emails saying 
they shouldn't use it any more. There are plenty of HTML 5 alternatives and as 
much as I hate to say it moonlight works very well for any silverlight content 
without DRM.

Sent from my BlackBerry 10 smartphone.
  Original Message  
From: ToddAndMargo
Sent: Tuesday, May 5, 2015 19:30
To: scientific-linux-users@fnal.gov
Subject: Re: flash alternatives?

On 05/05/2015 03:10 PM, ~Stack~ wrote:
 On 05/05/2015 03:29 PM, Jim Campbell wrote:
 On Tue, May 5, 2015, at 01:02 AM, ToddAndMargo wrote:
 [snip]
 Any other ways around Adobe's outdated flash plugin?

 If you want to watch Flash videos, though, probably the safest bet is to
 install Google Chrome, which embeds a Pepper flash-compatible plugin [0].

 There is a internal website at my job that /requires/ flash and that I
 need to access. I tried all kinds of things from installing from random
 repos to rolling my own build for all kinds of alternatives. Chrome was
 the only thing that worked for me. Then Google ditched RHEL6 support and
 I had people angry at me for running an outdated browser. That is when
 I stumbled on this:

 http://chrome.richardlloyd.org.uk/

 I know it has gotten both praise and hate on this list, but it works
 really well for me and it keeps my Chrome up to date. I loath Adobe, I
 prefer Firefox, and I can count all the sites I visit w/ Chrome on one
 hand...but for those few sites I gotta have flash. :-/

 Hopefully it works just as well for you.




Hi Stack,

So far, it is only annoying. Eventually I hope everyone switches over
to HTML5. But, if I have to install Chrome, I guess I will sometime
in the future

Thank you for helping me with this.

-T

-- 
~~
Computers are like air conditioners.
They malfunction when you open windows
~~

Re: KVM and OSx

[prmarino1]

You might want to look at what people do to create a hackintosh 
Essentially there are two things that will cause you problems. First is the 
Bios. Mac's use openfirmware which is directly  related to the the firmware 
used sparc (SUN/Oracle) and power series (IBM AIX/LINUX) boxes.
I don't believe QEMU will pass the native BIOS interface to the VM so you may 
need a bootloader to emulate it.

Your next hurdle is the drivers. Essentially if you can get Open Darwin to 
‎boot in a QEMU hosted VM then you are 90% there. OSX restricts what hardware 
it supports via a white list in what's known as plist fies. Plist files are XML 
files which include as the value of a tag plain text, base 64 text, and even an 
other base 64 encoded plist file.
Editing them is kind of like p‎ealing an onion and occasionally  you peal one 
layer and find more onions inside.
With a little research it should be doable but it probably won't be easy unless 
someone has already written a tool to do it for you.

Sent from my BlackBerry 10 smartphone.
  Original Message  
From: ToddAndMargo
Sent: Friday, March 20, 2015 17:43
To: scientific-linux-users@fnal.gov
Subject: Re: KVM and OSx

On 03/19/2015 12:45 PM, ToddAndMargo wrote:
 Hi All,

 Anyone get OSx working in KVM?

 -T


Looking over at:

http://www.contrib.andrew.cmu.edu/~somlo/OSXKVM/

Legal Disclaimer: I am not a lawyer, and this is
not legal advice. Taking into account that OS X is
now officially supported on commercial virtualization
solutions such as VMWare Fusion and Parallels, and after
a careful reading of Apple's OS X EULA (which states
that [...] you are granted a [...] license to install,
use and run one (1) copy of the Apple Software on a
single Apple-Branded computer at any one time), it
is my belief that it's OK to run Mac OS X as a QEMU
guest, provided the host hardware is a genuine,
Apple-manufactured Mac computer, running an arbitrary
(e.g. Linux) host OS. This happens to be how I'm
using it, but YMMV.

Yikes!



-- 
~~
Computers are like air conditioners.
They malfunction when you open windows
~~

Re: Successful configuration for openssh 6.x and kerberos

[prmarino1]

By the way I've been using this method successfully on Linux since 1999 and 
never had a compatibility issue.

Sent from my BlackBerry 10 smartphone.
  Original Message  
From: prmari...@gmail.com
Sent: Wednesday, March 11, 2015 10:21
To: Steven Timm; scientific-linux-users@fnal.gov
Subject: Re: Successful configuration for openssh 6.x and kerberos

Use pam_krb5 instead of the built in GSSAPI support. The only reason that 
option is there is for UNIX platforms that don't support PAM such as AIX


Sent from my BlackBerry 10 smartphone.
  Original Message  
From: Steven Timm
Sent: Wednesday, March 11, 2015 09:58
To: scientific-linux-users@fnal.gov
Subject: Successful configuration for openssh 6.x and kerberos

Does anyone have a successful ssh client side configuration
for scientific linux 7 (which uses openssh 6.4) such that it
can ssh into older machines at Fermilab using Kerberos authentication?
I am needing this for a remote site which is running openssh 6.
It appears that the GSSAPIKeyExchange method
which is the preferred method in openssh 5.x clients may not
be available in openssh 6, at least not in the version the remote
site has compiled for themselves.

Steve Timm



--
Steven C. Timm, Ph.D (630) 840-8525
t...@fnal.gov http://home.fnal.gov/~timm/
Office: Wilson Hall room 804
Fermilab Scientific Computing Division,
Scientific Computing Facilities Quadrant.,
Experimental Computing Facilities Dept.,
Project Lead for Virtual Facility Project.

Re: Docker

[prmarino1]

Sent from my BlackBerry 10 smartphone.
  Original Message  
From: Tom H
Sent: Sunday, February 15, 2015 09:08
To: SL Users
Subject: Re: Docker

On Tue, Feb 3, 2015 at 10:06 PM, Nico Kadel-Garcia nka...@gmail.com wrote:
 On Tue, Feb 3, 2015 at 12:17 PM, Tom H tomh0...@gmail.com wrote:


 1) RH doesn't license RHEL; it provides subscriptions to RHEL. The
 individual have licenses...

 I think you meant individual components have licenses, It's cool.

Indeed, thanks.


 2) What might be the rationale for RH to release SRPMs (as SRPMs
 previously and as a git tree now) that are different from the SRPMs
 from which it builds RHEL?!

 The most likely real reason would be accidental error. `Some SuSE 9
 SRPM's for example, sometimes included different components form the
 source tree in the SRPM depending on build options. Fedora and RHEL
 have been very good about including *all* compnents, even if only used
 for particular OS version or builds. I applaud them for consistency.

Of course errors can happen. I'd expect RH to fix them quickly because
it's in its interest for RHEL rebuilders to publish a distro as
similar to RHEL as possible.


How so? Red Hat wants people to buy the support exact duplicate distros give 
people an excuse not to buy the support. So how is that in Red Hats best 
interest?
 

‎
 The other *potential* source of such a discrepancy would be a
 manipulative weasel hiding hacks or concealing features incompatible
 with patent or copyright law. I'm not saying this is *likely*, our
 favorite upstream vendor has been really good about this, and I've met
 enough of their employees in the Boston area to have some confidence
 in them to not pull this sort of stunt. and if they got caught it
 would be disastrous for public confidence and for their business

Again, this isn't in RH's interest and an RH employee would destroy
his/her career.

Re: what port does theyum visual frontend use?

[prmarino1]

What visual front end are you referring to? There are a few of them to choose 
from.

‎They usually just call the yum python libraries and or command. No additional 
ports required.

In general yum only requires ports 80, and 443 for 90% of public repos; however 
yum supports using other methods like rsync too‎. Also port numbers my vary. 
For example I've seen publicly posted yum repos hosted on odd ports like HTTPS 
on port 8443 so you need to look at the repos you are using to determine if any 
of them are using odd port numbers and or protocols 


Sent from my BlackBerry 10 smartphone.
  Original Message  
From: hansel
Sent: Monday, February 9, 2015 09:57
To: scientific-linux-users@fnal.gov
Subject: what port does theyum visual frontend use?

From the command line, yum info any valid search produces output, 
while the visual frontend always reports no results were found (annoying 
passive voice). The visual tool does provide repository listings.

It appears the reason is that yesterday (Sun 2/8) I closed a port at the 
router used by this tool. 80, 8080, and 443 (as well as 992) are open and 
I thought that was sufficient. Yum docs claim 443 and 80 are sufficient, 
at least as I read them.

This is a Motorola router integrated with a cable modem (SBG6580) -- that 
has worked mostly flawlessly for about a year.

FWIW, this change reduced root breakin attempts from thousands to 1 in 24 
hours, so it may be a reasonable trade-off.

Thank you,
Mark Hansel

Re: Docker

[prmarino1]

Ok for clarification the subscription is a subscription for support not the 
software per the terms of the GPL license.

In no way is Red Hat required to provide BINARY RPM's SRPM's ‎or even the spec 
files to generate RPM, however in the past they did. Now they still provide the 
patches and spec files but they don package them for you because that is part 
of the support you get with the subscription and the GPL and the GNU 
manifesto clearly states that they are not only allowed to do this but in fact 
this was a recommended business model for free speech software since long 
before the Linux kernel was created.

Red hat is doing nothing wrong and reality has a long standing history of going 
above and beyond what they are required to do for the community‎. 

By the way the Pre RHEL version of Red Hat still exists they just renamed it 
Fedora and stopped charging for box sets because once people started getting 
DSL lines and CD/DVD burners it didn't make sence to still attempt to put it in 
a pretty box in a retail store and charge $90 for a bunch of CD's you could 
have downloaded over your 28.8k modem if you were willing to tie up a phone 
line for a few days.


Sent from my BlackBerry 10 smartphone.
  Original Message  
From: Tom H
Sent: Tuesday, February 3, 2015 12:18
To: SL Users
Subject: Re: Docker

On Mon, Feb 2, 2015 at 6:25 PM, Yasha Karant ykar...@csusb.edu wrote:
 On 02/02/2015 11:35 AM, Connie Sieh wrote:
 On Fri, 30 Jan 2015, Yasha Karant wrote:

 Presumably, any application that will run under CentOS, in particular,
 CentOS 7 that is the RHEL source release for other ports, such as SL 7,
 should be able to run under SL. My understanding is that SL 7 is not
 built from the actual RHEL 7 source that is used to build RHEL 7 that is
 licensed for fee, but from the RHEL packaged CentOS source (CentOS now
 effectively being a unit of Red Hat, a for-profit corporation) that is
 used to build CentOS 7 (that, as with SL 7, is licensed for free as a
 binary installable executable system that requires no building from
 source per se).

 SL is built from the source that Red Hat has provided. It is built from
 the same source that all rebuilds can build from. There is no such thing as
 RHEL packaged CentOS source .

 Please correct me if I am in error. RHEL, binary licensed for fee, is built
 from a source that RH does not seem to release. Rather, RH releases,
 through the RH subsidiary CentOS and a GIT mechanism, a source for all
 rebuilds, supposedly including CentOS. Thus, SL and CentOS are built from
 the same source, but the actual RHEL source may or not may in fact (claims
 to the contrary notwithstanding) be the same, as no one outside of RH or a
 RH licensee actually sees the source for RHEL. If RHEL also is built
 through a GIT mechanism, I am assuming that the Internet path to the RHEL
 GIT is not the same as that to the public rebuildable CentOS GIT. In the
 event that Fermilab or CERN has licensed the actual RHEL 7 source as a RHEL
 licensee, would personnel at either non-RH entity be allowed to comment if
 in fact there were non-trivial differences between the actual RHEL 7 source
 and the rebuildable CentOS 7 source? Trivial differences would be the
 presence of RH logos and splash screens, each of which is replaced by
 whatever the rebuilder is using (SL for the SL rebuild) -- but all of the
 internal intellectual property references in the source code still
 (presumably) mentions RH in both the actual RHEL 7 source and the CentOS 7
 rebuildable source.

1) RH doesn't license RHEL; it provides subscriptions to RHEL. The
individual have licenses...

2) What might be the rationale for RH to release SRPMs (as SRPMs
previously and as a git tree now) that are different from the SRPMs
from which it builds RHEL?!

3) The RPMs that are distributed by SL and CentOS are sometimes
different from the RPMs that are distributed by RH because, for
example, RH might use brpackage-x.y-1.el7 to satisfy
package-i.j-k.el7's BuildRequires but might only release
brpackage-x.y-2.el7. So SL and CentOS have to use the latter to build
package-i.j-k.el7's.

Re: SL 7.0 and WINS name resolution

[prmarino1]

Wins is now considered obsolete along with netbios even by Microsoft.‎ In modern environments every thing should use DNS. XP was the last version of windows which shipped with netbios turned on by default and without netbios wins doesn't work either.  Sent from my BlackBerry 10 smartphone. From: Ed AgoffSent: Wednesday, January 28, 2015 15:55To: scientific-linux-users@fnal.govSubject: SL 7.0 and WINS name resolutionIn SL 7.0, adding "wins" to end of hosts line in /etc/nsswitch.conf no longer gives me the WINS name resolution I had in earlier versions, i.e. I could ping NetBIOS names from SL 6.x command line. I've added and enabled various other services in a blind effort to get it working, to no effect: nscd, samba, and samba-winbindWhat's missing in SL 7.0 that was present and allowed this in SL 6.x?

Re: clonezilla or equivalent

[prmarino1]

In the past I use to use a utility called mkcdrec which has a successor project 
called relax and recover (rear for short) I haven't used the new version but it 
should work well.

That said if you can package every thing in rpms you could use spacewalk or 
katello to create identical builds including copying config files. As a long 
term solution I like this option because it allows you to quickly rebuild after 
a catastrophic failure in a very clean precise way. It also allows for quick 
expansion of an existing environment. ‎In my environment the typical spacewalk 
build takes 20 minutes and in most cases includes every thing needed to bring 
the box up immediately aside from state data such as database content and my 
normal database recovery scripts handle that and in many cases spacewalk even 
automatically executes them after the install is complete.

Sent from my BlackBerry 10 smartphone.
  Original Message  
From: Yasha Karant
Sent: Wednesday, January 28, 2015 20:09
To: scientific-linux-users@fnal.gov
Subject: clonezilla or equivalent

We are in the process of migrating one of our compute engines (a CUDA 
Nvidia GPU close coupled multichassis unit using Infiniband for the 
compute fabric) to SL7 from SL6.

I have a fully operational SL 7 installation on my workstation that also 
has a CUDA Nvidia GPU. We will first migrate the head node of the 
compute engine to SL 7 and then continue with the rest of the nodes (the 
head node has the 802.3 connection to the LAN and then Internet/WAN). 
We plan to clone the SL7 boot harddrive from my workstation rather than 
go through a full install from media -- we have done this before and 
find cloning and then readjusting partitions to be the fastest method in 
our circumstances.

In the past, we have physically removed drives and used an external 
cloning device -- easy to do on the primary servers as these all have 
drives in externally removable carriers -- but this would require me to 
open up and tear down my workstation. I have mounted a new drive -- 
upon which we shall be putting SL7 for the compute engine -- in an 
external USB3 interface. My workstation detects the drive; under SL7, 
it is /dev/sdj . However, a dd does not work -- it seems not to want to 
clone beyond 4 GBytes, rather than the full drive (the destination hard 
drive has sufficient capacity to hold the entire image of the source 
hard drive). My workstation has multiple bootable harddrives -- I am 
booting from a different drive than the one from which I am cloning and 
the clone source and target drives are not mounted during the cloning 
(obviously, still visible in /dev ).

My next approach -- before disassembly -- will be to try clonezilla or 
the equivalent. As I understand clonezilla, I boot from the clonezilla 
dvd and then clone from source to target. Does clonezilla permit 
cloning over a USB3 interface, or only a USB 2 (that I also can use)? 
We are using ext4 partitions.

Does anyone have a preferred utility over clonezilla?

Any advice would be appreciated.

Yasha Karant