查看 RedHat 版本的方法

方法一：
查看redhat-release文件
[root@server ~]# cat /etc/redhat-release 
Red Hat Enterprise Linux AS release 4 (Nahant Update 8)

方法二：
查看issue文件
[root@server ~]# cat /etc/issue
Red Hat Enterprise Linux AS release 4 (Nahant Update 8)
Kernel /r on an /m

方法三：
使用lsb_release命令
[root@server ~]# lsb_release -a
LSB Version: :core-3.0-ia32:core-3.0-noarch:graphics-3.0-ia32:graphics-3.0-noarch
Distributor ID: RedHatEnterpriseAS
Description: Red Hat Enterprise Linux AS release 4 (Nahant Update 8)
Release: 4
Codename: NahantUpdate8