如何查看linux版本

1. 查看内核版本命令：

1)# cat /proc/version
  Linux version 2.6.9-78.ELsmp ([e-mail]) (gcc version 3.4.6 20060404 (Red Hat 3.4.6-10)) #1 SMP Wed Jul 9 15:46:26 EDT 2008

2)# uname -a
  Linux ODSETL01 2.6.9-78.ELsmp #1 SMP Wed Jul 9 15:46:26 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux

2. 查看linux版本：

1) 登录到服务器执行 lsb_release -a ,即可列出所有版本信息,例如:

   # lsb_release -a
   LSB Version:    :core-3.0-amd64:core-3.0-ia32:core-3.0-noarch:graphics-3.0-amd64:graphics-3.0-ia32:graphics-3.0-noarch
   Distributor ID: RedHatEnterpriseAS
   Description:    Red Hat Enterprise Linux AS release 4 (Nahant Update 7)
   Release:        4
   Codename:       NahantUpdate7
   注: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/issue,例如如下:

   # cat /etc/issue
   Red Hat Enterprise Linux AS release 4 (Nahant Update 4)
   Kernel \r on an \m

3) 登录到linux执行cat /etc/redhat-release ,例如如下:

   # cat /etc/redhat-release
   Red Hat Enterprise Linux AS release 4 (Nahant Update 4)
   注:这种方式下可以直接看到具体的版本号，比如 AS4 Update 4

4) 登录到linux执行rpm -q redhat-release ,例如如下:

   # rpm -q redhat-release
   redhat-release-4AS-5.5
   注:这种方式下可看到一个所谓的release号，比如上边的例子是3
   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
   redhat-release-4AS-6 -> Redhat Enterprise Linux AS 4 Update 5
   redhat-release-4AS-7 -> Redhat Enterprise Linux AS 4 Update 6
   redhat-release-4AS-8 -> Redhat Enterprise Linux AS 4 Update 7
   另:第3)、4)两种方法只对Redhat Linux有效.