systemctl for emacs on Ubuntu and debian

Run systemctl --user enable --now emacs

Which should give in /usr/local/lib/systemd/user/emacs.service:

 [Unit]

Description=Emacs text editor
Documentation=info:emacs man:emacs(1) https://gnu.org/software/emacs/

[Service]
Type=simple
ExecStart=/usr/bin/emacs --fg-daemon
ExecStop=/usr/bin/emacsclient --eval "(kill-emacs)"
#Environment=SSH_AUTH_SOCK=%t/keyring/ssh
Restart=on-failure

[Install]
WantedBy=default.target

 systemctl --user stop emacs

systemctl --user daemon-reload

 systemctl --user start emacs