How to show active Fail2ban jails

Fail2ban is a daemon that can be used to monitor the logs of services and ban clients based on incorrect behaviour. A must-have on your Linux system. But sometimes you can forget to enable the correct jails, so always check the active jails on your system. This can be done with the "fail2ban-client" command:

#> fail2ban-client status

Executing that will show you the list of active jails. Ensure that your jails are listed there. Example output:

Status
|- Number of jail:      5
`- Jail list:   apache-modsecurity, apache-overflows, apache-shellshock, nginx-req-limit, sshd

Is your jail not listed? Ensure that "enabled = true" is set in your jail configuration.