[ale] Need AWK Guru input

[Lightner, Jeff]

The man page on RHEL says lsb_release parses the /etc/<distrib>-release file which is why I made my comments as that would be /etc/redhat-release on RHEL.

With /etc/redhat-release in place:
lsb_release -a
LSB Version:    :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID: RedHatEnterpriseServer
Description:    Red Hat Enterprise Linux Server release 5.5 (Tikanga)
Release:        5.5
Codename:       Tikanga

Without /etc/redhat-release in place:
# mv /etc/redhat-release /etc/redhat-release.20110801
# lsb_release -a
LSB Version:    :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID: n/a
Description:    (none)
Release:        n/a
Codename:       n/a

The info in /etc/lsb_release.d on RHEL doesn't contain the distro version but rather the LSB version and my read of the man page says that is the way it should be (except man page talks about a single /etc/lsb_release file - RedHat likes to expand such things into .d directories so you can have multiple things configured via separate files rather than all in one big file).


-----Original Message-----
From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of The Don Lachlan
Sent: Monday, August 01, 2011 2:03 PM
To: ale at ale.org
Subject: Re: [ale] Need AWK Guru input

On Mon, Aug 01, 2011 at 05:35:55PM +0000, Lightner, Jeff wrote:
> Cool - never ran across that lsb_release command before.
> However it gives Version.Subversion (e.g. 5.5, 5.3, 5.1) as well as the
> keyword "Release:" so if the user just wants the major version (5) he'd
> still need to strip the trailing number (if there - 5.0 just shows up as
> 5) and the keyword.   Still might be simpler to pipe that to awk since it
> gives less information though.
> One downside to either approach is it might not be correct - sometimes
> admins muck with /etc/redhat-release because applications check it to
> install and fail.   (Oracle apps are great for that - they tell you RHEL5
> is supported but their installation checks fail if they don't find it is
> RHEL4 for some things.)
> Often such hacks are only done on /etc/redhat-release and /etc/issue is
> left unmolested.   My read of lsb_release man page says it parses from
> /etc/redhat-release so using /etc/issue might be a better way to go.

The reason I asked about 'lsb_release -r' is because it's used on many
distributions and more standardized. If something changes in
/etc/redhat-release or whatever raw file, the distro maintains lsb_release
and your script chugs along happily.

-L

> -----Original Message-----
> From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of The Don Lachlan
> Sent: Monday, August 01, 2011 11:29 AM
> To: ale at ale.org
> Subject: Re: [ale] Need AWK Guru input
> 
> On Mon, Aug 01, 2011 at 11:17:33AM -0400, Dennis Ruzeski wrote:
> > Something like this?
> > cat /etc/redhat-release |awk  '/release/ { for (x=1;x<=NF;x++) if
> > ($x~"release") print $(x+1) }'
> 
> Wouldn't 'lsb_release -r' hand back the same info?
> 
> -L
> 
> > On Mon, Aug 1, 2011 at 10:52 AM, Chuck Payne <terrorpup at gmail.com> wrote:
> > > Guys,
> > >
> > > I am working on adding servers to my Satellite server, and I like to
> > > be able to get in with a script and call on the following
> > >
> > > /etc/redhat_release
> > >
> > > But I only want to get the number, so that I can see if it RHEL 4 or
> > > 5, I been trying to do with awk, but I am not able to get anything,
> > > what is the best way to only put numbers?
> > >
> > > --
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