CentOS是哪个版本 CentOS版本信息查看技巧

root@MyMail ~ # uname 
Linux 
root@MyMail ~ # uname -r 
2.6.18-164.el5 
[root@localhost ~]# uname -a 
Linux localhost.localdomain 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:35 EDT 2010 i686 i686 i386 GNU/Linux 
[root@bogon yum.repos.d]# cat 
/etc/redhat-release CentOS release 6.8 (Final)