CentOS7 NetworkManaer 未运行

[root@localhost ~]# nmtui
NetworkManaer 未运行。

但是ping外网是没有问题的。

输入以下命令：

yum install NetworkManager-tui

yum-config-manager --enable

systemctl start NetworkManager

再次输入nmtui，就可以发现进入设置窗口了

 后来发现ssh提示连接超时，用虚拟ping主机能连接，而主机无法访问虚拟机，修改 /etc/ssh/  目录下的sshd服务配置文件 sshd_config

  1 #       $OpenBSD: sshd_config,v 1.100 2016/08/15 12:32:04 naddy Exp $
  2 
  3 # This is the sshd server system-wide configuration file.  See
  4 # sshd_config(5) for more information.
  5 
  6 # This sshd was compiled with PATH=/usr/local/bin:/usr/bin
  7 
  8 # The strategy used for options in the default sshd_config shipped with
  9 # OpenSSH is to specify options with their default value where
 10 # possible, but leave them commented.  Uncommented options override the
 11 # default value.
 12 
 13 # If you want to change the port on a SELinux system, you have to tell
 14 # SELinux about this change.
 15 # semanage port -a -t ssh_port_t -p tcp #PORTNUMBER
 16 #
 17 Port 22  #开启22端口
 18 #AddressFamily any
 19 #ListenAddress 0.0.0.0
 20 #ListenAddress ::

保存后，再次连接，连接成功。

参考：虚拟机下CentOS7开启SSH连接_dh2580-CSDN博客_centos7开启ssh

参考：“Linux打开nmtui出现NetworkManager is not running怎么办_鸭腿面好吃的博客-CSDN博客”