yum安装报错:[Errno 14] curl#6 - "Could not resolve host: mirrors.aliyun.com; Unknown error"

[root@localhost /]# yum install memcached
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyun.com; Unknown error"
Trying other mirror.
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: mirrors.aliyuncs.com; Unknown error"
Trying other mirror.

Solution:

[root@localhost /]# service networt restart
Redirecting to /bin/systemctl restart networt.service
Failed to restart networt.service: Unit not found.
[root@localhost /]# service network restart
Restarting network (via systemctl):  
                                                           [  OK  ]

 

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