如何查看Linux操作系统版本？

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如何查看Linux操作系统版本？
1. 查看内核版本命令：

$ cat /proc/version
 Linux version 2.6.32-358.el6.x86_64 ([email protected]) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-3) (GCC) ) #1 SMP Fri Feb 22 00:31:26 UTC 2013
$ uname -a
 Linux 192.168.1.10 2.6.32-358.el6.x86_64 #1 SMP Fri Feb 22 00:31:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
$ uname -r
 2.6.32-358.el6.x86_64

2. 查看Linux版本：
1) 执行 lsb_release -a ,即可列出所有版本信息,例如:

$ lsb_release -a
 LSB Version:    core-2.0-noarch:core-3.0-noarch:core-2.0-ia32:core-3.0-ia32:graphics-2.0-ia32:graphics-2.0-noarch:graphics-3.0-ia32:graphics-3.0-noarch
 Distributor ID: SUSE LINUX
 Description:    SUSE LINUX Enterprise Server 9 (i586)
 Release:        9
 Codename:       n/a

注:这个命令适用于所有的linux，包括Redhat、SuSE、Debian等发行版。
2) 执行cat /etc/issue,例如如下:

$ cat /etc/issue
 Welcome to SUSE LINUX Enterprise Server 9 (i586) - Kernel \r (\l).

3) 执行cat /etc/redhat-release ,例如如下:

$ cat /etc/*release*
 CentOS release 6.4 (Final)
 CentOS release 6.4 (Final)
 CentOS release 6.4 (Final)
 cpe:/o:centos:linux:6:GA

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