systemd

Overview

systemd manages Linux services — start, stop, restart, enable on boot, and monitor processes. It replaces init scripts with declarative unit files. Handles dependencies, auto-restart, logging (journald), resource limits, and timers (cron replacement).

Instructions

Step 1: Create a Service

# /etc/systemd/system/myapp.service — Node.js app as a system service
[Unit]
Description=My Node.js Application
After=network.target postgresql.service
Wants=postgresql.service

[Service]
Type=simple