下面介绍几种查看linux版本信息的方法：
1)uname -a
Linux asicveri12.cn.utstarcom.com 2.4.21-32.ELsmp #1 SMP Fri Apr 15 21:17:59 EDT 2005 i686 i686 i386 GNU/Linux
2)cat /proc/version
Linux version 2.4.21-32.ELsmp (bhcompile@tweety.build.redhat.com) (gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-52)) #1 SMP Fri Apr 15 21:17:59 EDT 2005
3)cat /etc/issue
Red Hat Enterprise Linux AS release 3 (Taroon Update 5)
Kernel \r on an \m