查看系统版本信息

[root@localhost ~]# cat /etc/redhat-release 
CentOS release 6.9 (Final)
[root@localhost ~]# uname -r
2.6.32-696.el6.x86_64
[root@localhost ~]# uname -m
x86_64
[root@localhost ~]# uname -a
Linux localhost.example 2.6.32-696.el6.x86_64 #1 SMP Tue Mar 21 19:29:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux