Gnome桌面右键弹出终端。

[root@localhost ~]# yum repolist

已加载插件：fastestmirror, langpacks
/var/run/yum.pid 已被锁定，PID 为 2611 的另一个程序正在运行。
Another app is currently holding the yum lock; waiting for it to exit...

[root@localhost ~]# yum makecache

已加载插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org/?

 

Cannot find a valid baseurl for repo: base/7/x86_64

[root@localhost ~]# sudo nano /etc/yum.repos.d/CentOS-Base.repo

修改镜像站点为aliyun服务器写入，保存

[root@localhost ~]# yum makecache

已加载插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile
元数据缓存已建立

[root@localhost ~]# yum install httpd

重启
[root@localhost ~]# systemctl start httpd.service
[root@localhost ~]# systemctl status httpd.service  查看状态
● httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled)
[root@localhost ~]# ifconfig  查看ip地址
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.159.129  netmask 255.255.255.0  broadcast 192.168.159.255
        inet6 fe80::2c10:185e:e5c4:821f  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:15:0c:28  txqueuelen 1000  (Ethernet)
        RX packets 46624  bytes 69433792 (66.2 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 7699  bytes 475065 (463.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0