虚拟机实验环境：

虚拟机：VMware

操作系统: CentOS


[root@localhost~]# uname  -a

Linuxlocalhost.localdomain 2.6.32-573.7.1.el6.i686 #1 SMP Tue Sep 22 19:05:58 UTC2015 i686 i686 i386 GNU/Linux

 

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

CentOS release 6.7(Final)

 

[root@localhost~]# yum –y update 

#内核、OS版本、所有软件都会升级，会更改相关配置环境，所以运维人员对于生产服务器操作系统的升级要慎重。

 

[root@localhost~]#uname  –a

Linuxlocalhost.localdomain 2.6.32-642.el6.i686 #1 SMP Tue May 10 16:13:51 UTC 2016i686 i686 i386 GNU/Linux

 

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

CentOS release 6.8(Final)