Linux查看版本的方法总结（包括Ubuntu，centos，SUSE Linux）
方法一
如果是centos
# cat /etc/centos-release
Centos release 6.8 (Final)
# cat /etc/redhat-release
Centos release 6.8 (Final)
如果是Ubuntu
#cat /etc/lsb-release
如果是SUSE Linux
# cat /etc/SuSE-release
SUSE Linux Enterprise Server 11 (x86_64)
VERSION = 11
PATCHLEVEL = 3
方法二（针对centos适用）
# rpm -q centos-release
方法三（其他常规方法）
uname -a
cat /proc/verison
cat /etc/issue