1. 查看内核版本命令：
1) [[email protected] ~]# cat /proc/version
Linux version 2.6.9-22.ELsmp ([email protected]) (gcc version 3.4.4 20050721 (Red Hat 3.4.4-2)) #1 SMP Mon Sep 19 18:00:54 EDT 2005
2) [[email protected] ~]# uname -a
Linux q1test01 2.6.9-22.ELsmp #1 SMP Mon Sep 19 18:00:54 EDT 2005 x86_64 x86_64 x86_64 GNU/Linux
3) [[email protected] ~]# uname -r
2.6.9-22.ELsmp
2.查看linux的版本主要有三种方法：
1) 登录到服务器执行 lsb_release -a ，即可列出所有版本信息，例如：
[[email protected] ~]# lsb_release -a
LSB Version: 1.3
Distributor ID: RedHatEnterpriseAS
Description: Red Hat Enterprise Linux AS release 4 (Nahant Update 1)
Release: 4
Codename: NahantUpdate1
[[email protected] ~]#
这个命令适用于所有的linux，包括Redhat、SuSE、Debian等发行版。
2) 登录到linux执行cat /etc/redhat-release ，例如如下：
[[email protected] ~]# cat /etc/redhat-release
Red Hat Enterprise Linux AS release 4 (Nahant Update 1)
[[email protected] ~]#
这种方式下可以直接看到具体的版本号，比如 AS4 Update 1
3）登录到linux执行rpm -q redhat-release ，例如如下
[[email protected] ~]# rpm -q redhat-release
redhat-release-4AS-2.4
[[email protected] ~]#
这种方式下可看到一个所谓的release号，比如上边的例子是2.4
这个release号和实际的版本之间存在一定的对应关系，如下：
redhat-release-3AS-1 -> Redhat Enterprise Linux AS 3
redhat-release-3AS-7.4 -> Redhat Enterprise Linux AS 3 Update 4
redhat-release-4AS-2 -> Redhat Enterprise Linux AS 4
redhat-release-4AS-2.4 -> Redhat Enterprise Linux AS 4 Update 1
redhat-release-4AS-3 -> Redhat Enterprise Linux AS 4 Update 2
redhat-release-4AS-4.1 -> Redhat Enterprise Linux AS 4 Update 3
redhat-release-4AS-5.5 -> Redhat Enterprise Linux AS 4 Update 4
注意：第（2）（3）两种方法只对Redhat Linux有效