● fail2ban.service - Fail2Ban Service
   Loaded: loaded (/lib/systemd/system/fail2ban.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Fri 2019-05-17 22:22:09 UTC; 39s ago
     Docs: man:fail2ban(1)
  Process: 299 ExecStart=/usr/bin/fail2ban-server -xf start (code=exited, status=255)
  Process: 293 ExecStartPre=/bin/mkdir -p /var/run/fail2ban (code=exited, status=0/SUCCESS)
 Main PID: 299 (code=exited, status=255)

May 17 22:00:59 salguton fail2ban-server[8911]:  Failed during configuration: Bad value substitution: option 'action' in section 'sshd' contains an interpolation key 'bantime' which is not a valid option nam
May 17 22:00:59 salguton fail2ban-server[8911]:  Async configuration of server failed
May 17 22:01:00 salguton systemd[1]: fail2ban.service: Main process exited, code=exited, status=255/n/a
May 17 22:01:00 salguton systemd[1]: fail2ban.service: Failed with result 'exit-code'.
May 17 22:22:08 salguton systemd[1]: Starting Fail2Ban Service...
May 17 22:22:08 salguton systemd[1]: Started Fail2Ban Service.
May 17 22:22:09 salguton fail2ban-server[299]:  Failed during configuration: Bad value substitution: option 'action' in section 'sshd' contains an interpolation key 'bantime' which is not a valid option name
May 17 22:22:09 salguton fail2ban-server[299]:  Async configuration of server failed
May 17 22:22:09 salguton systemd[1]: fail2ban.service: Main process exited, code=exited, status=255/n/a
May 17 22:22:09 salguton systemd[1]: fail2ban.service: Failed with result 'exit-code'.
Examine: xecStart=/usr/bin/fail2ban-server -xf start (code=exited, status=255)