Install NMTUI Centos7

INSTALLING NETWORKMANAGER

NetworkManager is installed by default on Red Hat Enterprise Linux. If necessary, to ensure that it is, run the following command as the rootuser:

~]# yum install NetworkManager

For information on user privileges and gaining privileges, see the Red Hat Enterprise Linux 7 System Administrator's Guide.

1.4.1. The NetworkManager Daemon

The NetworkManager daemon runs with root privileges and is, by default, configured to start up at boot time. You can determine whether the NetworkManager daemon is running by entering this command:

~]$ systemctl status NetworkManager
NetworkManager.service - Network Manager
   Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled)
   Active: active (running) since Fri, 08 Mar 2013 12:50:04 +0100; 3 days ago

The systemctl status command will report NetworkManager as Active: inactive (dead) if the NetworkManager service is not running. To start it for the current session run the following command as the root user:

~]# systemctl start NetworkManager

Run the systemctl enable command to ensure that NetworkManagerstarts up every time the system boots:

~]# systemctl enable NetworkManager

For more information on starting, stopping and managing services, see the Red Hat Enterprise Linux 7 System Administrator's Guide.