How do I make my custom app automatically restart on crash?

Try: sudo systemctl edit --force --full myapp.service

Info: Restart=on-failure restarts the app after a non-zero exit or crash, while RestartSec adds a delay before restarting. StartLimitBurst and StartLimitIntervalSec help prevent a service from repeatedly restarting in a crash loop.

Examples:

• $ sudo systemctl status myapp  # View service status
• $ sudo journalctl -u myapp -f  # Follow application logs in real-time
• $ sudo systemctl reset-failed myapp  # Reset crash rate limits

Note: Restart modes include no, always, on-failure, and on-abnormal. always also restarts a service after a clean exit (0), while on-failure is generally suitable for services that should restart after crashes or unsuccessful exits.