title: gunicorn active: failed, why don`t active gunicorn service?
body: <p>i hav ubuntu server 20.04 and a django project
  i set <br>
  /etc/systemd/system/gunicorn.socket</p>
  <pre><code>Description=gunicorn socket
  
  [Socket]
  ListenStream=/run/gunicorn.sock
  
  [Install]
  WantedBy=sockets.target
  </code></pre>
  <p>and <br>/etc/systemd/system/gunicorn.service</p>
  <pre><code>[Unit]
  Description=gunicorn daemon
  Requires=gunicorn.socket
  After=network.target
  
  [Service]
  User=sammy
  Group=www-data
  WorkingDirectory=/home/sammy/myprojectdir
  ExecStart=/home/sammy/myprojectdir/myprojectenv/bin/gunicorn \
            --access-logfile - \
            --workers 3 \
            --bind unix:/run/gunicorn.sock \
            myproject.wsgi:application
  
  [Install]
  WantedBy=multi-user.target
  </code></pre>
  <p>and i have this error</p>
  <pre><code> gunicorn.service - gunicorn daemon
       Loaded: loaded (/etc/systemd/system/gunicorn.service; enabled; vendor preset: enabled)
       Active: failed (Result: exit-code) since Wed 2022-03-16 11:49:31 +0330; 12min ago
  TriggeredBy: ● gunicorn.socket
      Process: 1891 ExecStart=/home/sammy/myprojectdir/myprojectenv/bin/gunicorn --access-logfile - --workers 3 --bi&gt;   Main PID: 1891 (code=exited, status=217/USER)
  
  Mar 16 11:49:31 srv174847 systemd[1]: Started gunicorn daemon.
  Mar 16 11:49:31 srv174847 systemd[1891]: gunicorn.service: Failed to determine user credentials: No such process:: Failed to determine user credentials: No such process
  Mar 16 11:49:31 srv174847 systemd[1891]: gunicorn.service: Failed at step USER spawning /home/sammy/myprojectdir/myprojectenv/bin/gunicorn: No such process
  Mar 16 11:49:31 srv174847 systemd[1]: gunicorn.service: Main process exited, code=exited, status=217/USER
  Mar 16 11:49:31 srv174847 systemd[1]: gunicorn.service: Failed with result 'exit-code'.
  
  </code></pre>
  <p>please help me</p>