[root@yinzhengjie ~]# which init

/sbin/init

[root@yinzhengjie ~]#

[root@yinzhengjie ~]# file /sbin/init

/sbin/init: ELF -bit LSB shared object, x86-, version  (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6., stripped

[root@yinzhengjie ~]#

[root@yinzhengjie ~]# rpm -qf /sbin/init

upstart-0.6.-.el6.x86_64

[root@yinzhengjie ~]#

[root@yinzhengjie ~]# ll /sbin/init

-rwxr-xr-x.  root root  Jun    /sbin/init

[root@yinzhengjie ~]#

[root@yinzhengjie ~]# ll -h /sbin/init

-rwxr-xr-x.  root root 147K Jun    /sbin/init

[root@yinzhengjie ~]#

[root@yinzhengjie ~]# mv /sbin/init /root/　　　　　　#我们将"/sbin/init"文件移动到"/root"目录，以模拟删除了"/sbin/init"文件

[root@yinzhengjie ~]#

[root@yinzhengjie ~]# ll

total

-rwxr-xr-x.  root root  Jun    init

[root@yinzhengjie ~]#

[root@yinzhengjie ~]# reboot　　　　　　　　　　　　　　#重启操作系统后发现无法正常启动了，一直卡在如下所示的图形界面。

Broadcast message from root@yinzhengjie

(/dev/pts/) at : ...

The system is going down for reboot NOW!

[root@yinzhengjie ~]#