Linux etc 目录文件

1、cat /etc/inittab 设定机器的运行级别：

     # 0 - halt (Do NOT set initdefault to this)
     # 1 - Single user mode
    # 2 - Multiuser, without NFS (The same as 3, if you do not have networking)
   # 3 - Full multiuser mode
   # 4 - unused
   # 5 - X11  桌面模式
    # 6 - reboot (Do NOT set initdefault to this)
    id:3:initdefault:

2、cat  /etc/issue  linux 发布的版本

CentOS release 6.6 (Final)
Kernel \r on an \m