Systemd Services

Manage system services with systemd.

Service Unit File

/etc/systemd/system/myapp.service

[Unit] Description=My Application After=network.target

[Service] Type=simple User=myapp WorkingDirectory=/opt/myapp ExecStart=/opt/myapp/bin/start ExecStop=/opt/myapp/bin/stop Restart=always RestartSec=5 Environment=NODE_ENV=production

[Install] WantedBy=multi-user.target

Service Management

systemctl daemon-reload systemctl start myapp systemctl stop myapp systemctl restart myapp systemctl enable myapp systemctl status myapp journalctl -u myapp -f

Timer (Cron Replacement)

/etc/systemd/system/backup.timer

[Unit] Description=Daily backup

[Timer] OnCalendar=daily Persistent=true

[Install] WantedBy=timers.target

Resource Limits

[Service] MemoryLimit=512M CPUQuota=50%

Best Practices

• Use Type=notify for better tracking

• Implement proper restart policies

• Use timers instead of cron

• Set resource limits