NOTE: This is only supported in Linux distros that use systemctl (Debian, Ubuntu, Mint etc.).

• Enable auto restart when logged off (only need to do this once per machine): $ sudo loginctl enable-linger $USER
• Create the directory structure: $ mkdir -p ~/.config/systemd/$USER
• Create a file with the following content at that directory, file path: ~/.config/systemd/$USER/warthog.service

  [Unit]
  Description=Warthog Node
  
  [Service]
  WorkingDirectory=<DIRECTORY WHERE YOU PLACED THE WARTHOG NODE EXECUTABLE>
  ExecStart=<PATH TO WARTHOG EXECUTABLE>
  Restart=always
  
  [Install]
  WantedBy=multi-user.target

• Reload systemctl daemon: systemctl --user daemon-reload
• Enable auto restart for Warthog service: systemctl --user enable warthog
• Start for Warthog service: systemctl --user start warthog
• Check status for Warthog service: systemctl --user status warthog

You need to have a static IP. Do as above but append the --enable-public flag at startup, i.e. use this file content:

[Unit]
Description=Warthog Node

[Service]
WorkingDirectory=<DIRECTORY WHERE YOU PLACED THE WARTHOG NODE EXECUTABLE>
ExecStart=<PATH TO WARTHOG EXECUTABLE> --enable-public
Restart=always

[Install]
WantedBy=multi-user.target