System MD

# List all loaded service units
systemctl list-units --type=service

# List all installed service files (including inactive)
systemctl list-unit-files --type=service

# Check status of a specific service (shows if running, logs, etc.)
systemctl status <service>.service

# Start a service
systemctl start <service>.service

# Stop a service
systemctl stop <service>.service

# Restart a service
systemctl restart <service>.service

# Enable a service to start at boot, `--now` will start it now 
systemctl enable <service>.service

# Disable a service at boot
systemctl disable <service>.service

# Reloads the unit files
sudo systemctl daemon-reload

# Shows the PID of a service
systemctl show -p MainPID --value <service>.service

View logs

Make sure to use sudo since logs can only be viewed based on perms, using sudo allows you to see all of them.

sudo journalctl -fu <service>.service

# or
sudo journalctl -u accesscore.file.generation.integration.service -n 200

Make a new service

1. Make a new file at: /etc/systemd/system/yourapp.service

[Unit]
Description=My Custom Service
After=network.target

[Service]
ExecStart=/usr/local/bin/mybinary --option foo # command to start your program
WorkingDirectory=/usr/local/bin # directory the program will use
Restart=always
User=youruser
Group=youruser

[Install]
WantedBy=multi-user.target

2. sudo systemctl daemon-reload

3. sudo systemctl enable yourapp.service

4. sudo systemctl start yourapp.service