一、查看内核版本命令：

(1)[root@localhost ~]#cat/proc/version

Linux version 2.6.18-238.el5 (mockbuild@x86-012.build.bos.redhat.com)(gcc version 4.1.2 20080704 (Red Hat 4.1.2-50)) #1 SMP Sun Dec 19 14:22:44 EST2010

(2)[root@localhost~]# uname -r

2.6.18-238.el5

(3)[root@localhost~]# uname -a

Linux SOR_SYS.99bill.com 2.6.18-238.el5 #1 SMP Sun Dec 19 14:22:44 EST2010 x86_64 x86_64 x86_64 GNU/Linux

二、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:

[root@localhost~]# lsb_release -a

LSB version:core-4.0-amd64:core-4.0-ia32:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-ia32:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-ia32:printing-4.0-noarch

Distributor ID: RedHatEnterpriseAS

Description:    Red HatEnterprise Linux AS release 4 (Nahant Update 4)

Release:        4

Codename:       NahantUpdate4

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:

[root@localhost~]# cat /etc/issue

Red Hat Enterprise Linux Server release 5.6 (Tikanga)

Kernel \r on an \m

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

[root@localhost~]#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 1

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

[root@localhost~]# rpm -q redhat-release

redhat-release-5Server-5.6.0.3

注:这种方式下可看到一个所谓的release号，比如上边的例子是5

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

另:第3)、4)两种方法只对Redhat Linux有效

5) [root@localhost~]#file /bin/bash

/bin/bash: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), forGNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9,stripped

6) [root@localhost~]#file /bin/cat

/bin/cat: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), forGNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9,stripped

查看linux内核版本及操作系统版本的命令