1) 卸載nginx
[root@locahost /]# yum remove nginx
2) 查看nginx是否還存在
[root@localhost /]# which nginx
3)重新安裝 Nginx
[root@localhost /]# yum install nginx
4)啟動 Nginx
[root@localhost /]# yum start nginx
5)設置自動開機啟動 Nginx
[root@localhost /]# yum enable nginx