有以下命令可以查看：

# lsb_release -a
LSB Version: :core-3.1-ia32:core-3.1-noarch:graphics-3.1-ia32:graphics-3.1-noarch
Distributor ID: CentOS
Description: CentOS release 5.4 (Final)
Release: 5.4
Codename: Final

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

root@MyMail ~ # unameLinux
root@MyMail ~ # uname -r
2.6.18-164.el5
neucrack@neucrack-ubuntu:~$ uname -a
Linux neucrack-ubuntu 4.4.0-53-generic #74-Ubuntu SMP Fri Dec 2 15:59:10 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

以下二种方法适用于RedHat,CentOS

root@MyMail ~ # cat /etc/redhat-release
CentOS release 5.4 (Final)

rpm -q redhat-release