Setup user autostart and properly configure systemd in Arch Linux

Create user:

• useradd -m -s /bin/bash username

Create example service, like node app:

• nano ~/.config/systemd/user/app.service

containing:

[Unit]
Description=One of the servers

[Service]
ExecStart=/usr/bin/node /home/username/server.js

[Install]
WantedBy=default.target

From root run: loginctl enable-linger username

and from user add: DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/$UID/bus

to /home/username/.bashrc

Then user can run: systemctl --user enable app.service

enable/disable/start/stop/status