檢視是否安裝apache
[root@wxb ~]# rpm -qa | grep httpd
檢視正在跑的程序并殺掉
[root@wxb ~]# ps -ef | grep dhcp
[root@wxb ~]# kill -9 1775
搜尋與httpd有關
[root@wxb ~]# yum search httpd
安裝apache軟體包：（由apache http server看到apache的安裝包為httpd.x86_64)
yum install httpd.x86_64
啟動/停止/重新開機Apache服務：
service httpd start
service httpd stop