1）命令： lsb_release -a
[root@localhost tmp]# lsb_release -a
LSB Version: :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 6.3 (Final)
Release: 6.3
Codename: Final
2）命令：cat /etc/redhat-release
[root@localhost tmp]# cat /etc/redhat-release
CentOS release 6.3 (Final)