[root@localhost ~]# cat /proc/version
Linux version 2.6.9-42.EL (bhcompile@hs20-bc1-1.build.redhat.com) (gcc version 3.4.6 20060404 (Red Hat 3.4.6-2)) #1 Wed Jul 12 23:16:43 EDT 2006

[root@localhost ~]# cat /etc/redhat-release
Red Hat Enterprise Linux AS release 4 (Nahant Update 4)

[root@localhost ~]# uname -a
Linux localhost.localdomain 2.6.9-42.EL #1 Wed Jul 12 23:16:43 EDT 2006 i686 i686 i386 GNU/Linux

[Ссылки]

1. Мини-справочник по командам UNIX.