一、查看linux内核版本命令（两种方法）:
1、 cat /proc/version
Linux version 2.6.32-573.26.1.el6.x86_64 (mockbuild@c6b8.bsys.dev.centos.org)
(gcc version 4.4.7 20120313 (Red Hat 4.4.7-16) (GCC) ) #1
SMP Wed May 4 00:57:44 UTC 2016
2、uname -a
Linux szphp01.dxqas.com 2.6.32-573.26.1.el6.x86_64 #1 SMP Wed May 4 00:57:44 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
二、查看linux系统版本的命令（3种方法）:
1、lsb_release -a,即可列出所有版本信息：
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 6.7 (Final)
Release: 6.7
Codename: Final
这个命令适用于所有linux发行版，包括Redhat 、SuSE、Debian...等发行版
2、cat /etc/redhat-release,这种方法只是和Redhat系的linux
CentOS release 6.7 (Final)
3、cat /etc/issue,此命令也适用于所有的Linux发行版
CentOS release 6.7 (Final)
Kernel \r on an \m
