root@as1 ~]# systemctl status NetworkManager
● NetworkManager.service - Network Manager
Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
Active: active (running) since Fri 2021-11-19 03:20:19 KST; 3 months 23 days ago
Docs: man:NetworkManager(8)
Main PID: 2727 (NetworkManager)
CGroup: /system.slice/NetworkManager.service
└─2727 /usr/sbin/NetworkManager --no-daemon
Nov 19 03:20:22 as1 NetworkManager[2727]: [1637259622.7073] device (em1): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
Nov 19 03:20:22 as1 NetworkManager[2727]: [1637259622.7080] device (em1): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'managed')
Nov 19 03:20:22 as1 NetworkManager[2727]: [1637259622.7083] device (em1): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'managed')
Nov 19 03:20:22 as1 NetworkManager[2727]: [1637259622.7084] device (em1): state change: secondaries -> activated (reason 'none', sys-iface-state: 'managed')
Nov 19 03:20:22 as1 NetworkManager[2727]: [1637259622.7086] manager: NetworkManager state is now CONNECTED_LOCAL
Nov 19 03:20:22 as1 NetworkManager[2727]: [1637259622.7201] manager: NetworkManager state is now CONNECTED_SITE
Nov 19 03:20:22 as1 NetworkManager[2727]: [1637259622.7201] policy: set 'em1' (em1) as default for IPv4 routing and DNS
Nov 19 03:20:22 as1 NetworkManager[2727]: [1637259622.7202] device (em1): Activation: successful, device activated.
Nov 19 03:20:22 as1 NetworkManager[2727]: [1637259622.7204] manager: NetworkManager state is now CONNECTED_GLOBAL
Nov 19 03:20:26 as1 NetworkManager[2727]: [1637259626.8859] manager: startup complete