查看linux是哪个系统

cat /etc/issue

[root@i-717lsfc ~]# cd /
[root@i-717lsfc /]# ls
bin  boot  dev  etc  home  lib  lib64  lost+found  media  mnt  opt  proc  root  sbin  selinux  srv  sys  tmp  usr  var
[root@i-717lsfc /]# cat /etc/issue
CentOS release 6.5 (Final)
Kernel \r on an \m