查看linux系统信息

查看内核版本命令:

cat /proc/version
linux-o497:~ # cat /proc/version
Linux version 2.6.27.29-0.1-xen (geeko@buildhost) (gcc version 4.3.2 [gcc-4_3-branch revision 141291] (SUSE Linux) ) #1 SMP 2009-08-15 17:53:59 +0200

uname -a ?
linux-o497:~ # uname -a
Linux linux-o497 2.6.27.29-0.1-xen #1 SMP 2009-08-15 17:53:59 +0200 i686 i686 i386 GNU/Linux

uname -r
linux-o497:~ # uname -r
2.6.27.29-0.1-xen

查看linux版本:

lsb_release -a
linux-o497:~ # lsb_release -a
LSB Version:    core-2.0-noarch:core-3.2-noarch:core-2.0-ia32:core-3.2-ia32:desktop-3.2-ia32:desktop-3.2-noarch:graphics-2.0-ia32:graphics-2.0-noarch:graphics-3.2-ia32:graphics-3.2-noarch
Distributor ID: SUSE LINUX
Description:    openSUSE 11.1 (i586)
Release:        11.1
Codename:       n/a

注:这个命令适用于所有的linux,包括Redhat、SuSE、Debian等发行版.

cat /etc/issue
linux-o497:~ # cat /etc/issue
Welcome to openSUSE 11.1 - Kernel r (l).
cat /etc/redhat-release ?
[root@li82-95 ~]# cat /etc/redhat-release
CentOS release 5.3 (Final)

注:这种方式下可以直接看到具体的版本号,比如 AS4 Update 1

rpm -q redhat-release
[root@q1test01 ~]# rpm -q redhat-release
redhat-release-4AS-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

另:最后两种方法只对Redhat Linux有效.