systemctl
systemd를 제어하는 systemctl의 사용법을 정리한다.
1. systemctl
1.1. systemctl start [Service]
Service를 시작한다.
1.2. systemctl stop [Service]
Service를 정지한다.
1.3. systemctl restart [Service]
Service를 재시작한다.
1.4. systemctl status [Service]
# systemctl status sshd
● ssh.service - OpenBSD Secure Shell server
Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2020-08-16 14:21:33 KST; 4min 44s ago
Process: 23396 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)
Main PID: 23397 (sshd)
Tasks: 7 (limit: 4915)
CGroup: /system.slice/ssh.service
├─ 3613 tmux
├─ 3616 -zsh
├─23019 sshd: root@pts/0
├─23021 -zsh
├─23397 /usr/sbin/sshd -D
├─24163 systemctl status sshd
└─24164 less
Aug 16 14:21:33 node09 systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
Aug 16 14:21:33 node09 systemd[1]: ssh.service: Found left-over process 23021 (zsh) in control group while starting unit. Ignoring.
Aug 16 14:21:33 node09 systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
Aug 16 14:21:33 node09 systemd[1]: ssh.service: Found left-over process 23394 (systemctl) in control group while starting unit. Ignoring.
Aug 16 14:21:33 node09 systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
Aug 16 14:21:33 node09 systemd[1]: ssh.service: Found left-over process 23395 (systemd-tty-ask) in control group while starting unit. Ignorin
Aug 16 14:21:33 node09 systemd[1]: This usually indicates unclean termination of a previous run, or service implementation deficiencies.
Aug 16 14:21:33 node09 sshd[23397]: Server listening on 0.0.0.0 port 22.
Aug 16 14:21:33 node09 sshd[23397]: Server listening on :: port 22.
Aug 16 14:21:33 node09 systemd[1]: Started OpenBSD Secure Shell server.Service의 상태를 출력한다. [Shell 1]은 sshd Service의 상태를 출력하는 모습을 나타내고 있다.