majiayu000 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]
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