查看linux版本

方法一:

[root@localhost ~]# cat /proc/version   

Linux version 3.10.0-327.el7.x86_64 (builder@kbuilder.dev.centos.org) (gcc version 4.8.3 20140911 (Red Hat 4.8.3-9) (GCC) ) #1 SMP Thu Nov 19 22:10:57 UTC 2015

方法二:

[root@localhost ~]# cat /etc/os-release