list all banned ip in fail2ban

fail2ban-client-ls-ip

#!/bin/bash

## usage: fail2ban-client-ls-ip [JAIL]

JAIL=$1
PROGNAME=$0
if [ -z $JAIL ]; then
  [ -z $PROGNAME ] && echo "ERROR: $PROGNAME is empty" && exit 1

 sudo fail2ban-client status |
           grep 'Jail list:' |
                sed "s/ //g" |
            awk '{print $2}' |
              sed "s/,/\n/g" |
             xargs -L 1 -I{} /bin/bash -c 'echo -e "\njail: {}"; $0 {};' $PROGNAME
else
 sudo fail2ban-client status $JAIL | grep -oE '((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)' | sort
fi