AIX#

oslevel -s
5300-06-01-0000

Solaris#

I always find Solaris versions confusing.
uname -a

Or

showrev -a

Hostname: starbug
Hostid: nnnnnnnn
Release: 5.9
Kernel architecture: sun4u
Application architecture: sparc
Hardware provider: Sun_Microsystems
Domain: solar.com
Kernel version: SunOS 5.9 May 2002

OpenWindows version: 
X11 Version 6.4.2 11 April 2001

No patches are installed

Linux #

Uusally you can get the kernal version form:
uname -a

Most Linux versions have additional information on the version.

 uname -a
Linux francis 2.6.16.21-0.8-smp #1 SMP Mon Jul 3 18:25:39 UTC 2006 i686 athlon i386 GNU/Linux

SuSE#

On SUSE try this for more details:
cat /etc/SuSE-release

SUSE Linux Enterprise Server 10 (i586)
VERSION = 10

And someone said:

# cat /etc/issue

Welcome to SUSE Linux Enterprise Server 10 (i586) - Kernel \r (\l).

Redhat#

$ cat /etc/redhat-release
Red Hat Enterprise Linux AS release 3 (Taroon Update 5)

More Information#

There might be more information for this subject on one of the following:

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« This page (revision-5) was last changed on 26-Aug-2012 10:23 by jim