1. 查看內核版本命令：
1) [root@q1test01 ~]# 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) [root@q1test01 ~]# 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) [root@q1test01 ~]# uname -r
2.6.9-22.ELsmp
2. 查看linux版本：
1) 登錄到服務器執行 lsb_release -a ,即可列出所有版本信息,例如:
[[email protected] ~]# [root@q1test01 ~]# 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 2)
Release: 4
Codename: NahantUpdate2
注:這個命令適用於所有的linux，包括Redhat、SuSE、Debian等發行版。
2) 登錄到linux執行cat /etc/issue,例如如下:
[root@q1test01 ~]# cat /etc/issue
Red Hat Enterprise Linux AS release 4 (Nahant Update 2)
Kernel \r on an \m
3) 登錄到linux執行cat /etc/redhat-release ,例如如下:
[root@q1test01 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux AS release 4 (Nahant Update 2)
注:這種方式下可以直接看到具體的版本號，比如 AS4 Update 1
4) 登錄到linux執行rpm -q redhat-release ,例如如下:
[root@q1test01 ~]# rpm -q redhat-release
redhat-release-4AS-3
注:這種方式下可看到一個所謂的release號，比如上邊的例子是3
這個release號和實際的版本之間存在一定的對應關系，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)兩種方法只對Redhat Linux有效.