fail2ban does not start at boot, and I can't start it either by:
sudo service fail2ban restart, which shows:
* Restarting authentication failure monitor fail2ban [fail]
sudo service fail2ban start, which shows nothing at all.
Nothing is logged to /var/log/fail2ban.log in any case
This has happened after I reinstalled it (from Synaptic), since I wanted default jails and configs back.