查看CentOS版本方法

[root@localhost ~]# lsb_release -a

LSB Version:    :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch

Distributor ID: CentOS

Description:    CentOS release 5.5 (Final)

Release:        5.5

Codename:      Final

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:

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

CentOS release 5.5 (Final)

Kernel r on an m

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3) 执行cat /etc/redhat-release ,例如如下:

[root@localhost ~]# cat /etc/redhat-release

CentOS release 5.5 (Final)

查看系统是64位还是32位:

1、getconf LONG_BIT or getconf WORD_BIT

[root@localhost ~]# getconf LONG_BIT

64

2、file /bin/ls

[root@localhost ~]# file /bin/ls

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