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2.3. Checking the Status of NetworkManager

To check whether NetworkManager is running:
~]$ 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
Note that the systemctl status command displays Active: inactive (dead) when NetworkManager is not running.