如何查看已安装的版本信息：

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

Linux version 2.6.32-696.el6.x86_64 (mockbuild@c1bm.rdu2.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-18) (GCC) ) #1 SMP Tue Mar 21 19:29:05 UTC 2017

2)

[root@localhost ~]# uname -a

Linux hkdata02 2.6.32-696.el6.x86_64 #1 SMP Tue Mar 21 19:29:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

3)

[root@localhost ~]# uname -r

2.6.18-194.el5

2. 查看linux版本：

1) 列出所有版本信息,

[root@localhost ~]# lsb_release -a

LSB Version:    :base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch

Distributor ID:    CentOS
Description:    CentOS release 6.9 (Final)
Release:    6.9
Codename:    Final

注:这个命令适用于所有的linux，包括、、Debian等发行版。

2) 执行cat /etc/issue,例如如下:

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

CentOS release 6.9 (Final)

Kernel \r on an \m

3) 执行cat /etc/redhat-release ,例如如下:

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

CentOS release 6.9 (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, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, stripped

3、lsb_release  -a

4、或者是使用查看文件的方法。

vi /ect/issue

CentOS release 6.9 (Final)

Kernel \r on an \m