root@samuel-pc:~/revamp# systemctl start gunicorn
Failed to start gunicorn.service: Unit gunicorn.service is not loaded properly: Invalid argument.
See system logs and 'systemctl status gunicorn.service' for details.
root@samuel-pc:~/revamp#

[Unit]
Description=gunicorn daemon
After=network.target

[Service]
User=root
Group=www-data
WorkingDirectory=/root/revamp
#ExecStart=gunicorn --access-logfile - --workers 3 --bind unix:/root/revamp/rev$


[Install]
WantedBy=multi-user.target

ExecStart=gunicorn --access-logfile - --workers 3 --bind unix:/root/revamp/revamp.sock revamp.wsgi:application

● gunicorn.service - gunicorn daemon
   Loaded: error (Reason: Invalid argument)
   Active: inactive (dead)

Jun 28 21:48:16 samuel-pc systemd[1]: [/etc/systemd/system/gunicorn.service:9] Executable path is not absolute, ignoring: gunicorn --access-logfile - --workers 3 --bind unix:/root/revamp/revamp
Jun 28 21:48:16 samuel-pc systemd[1]: gunicorn.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.
Jun 28 21:53:29 samuel-pc systemd[1]: gunicorn.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.
Jun 29 05:05:06 samuel-pc systemd[1]: [/etc/systemd/system/gunicorn.service:9] Executable path is not absolute, ignoring: gunicorn --access-logfile - --workers 3 --bind unix:/root/revamp/revamp
Jun 29 05:05:06 samuel-pc systemd[1]: gunicorn.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.
Jun 29 05:05:24 samuel-pc systemd[1]: [/etc/systemd/system/gunicorn.service:9] Executable path is not absolute, ignoring: gunicorn --access-logfile - --workers 3 --bind unix:/root/revamp/revamp
Jun 29 05:05:24 samuel-pc systemd[1]: gunicorn.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.

gunicorn my_project.wsgi:application ...

which gunicorn

/usr/local/bin/gunicorn

ExecStart=/usr/local/bin/gunicorn --access-logfile - --workers 3 [...]