checkfail2ban.sh

#!/bin/sh
number=200
CMDS="curl jq"
for i in $CMDS
do
        # command -v will return >0 when the $i is not found
	command -v $i >/dev/null && continue || { echo "please install $i for this script to work"; exit 1; }
done
dogrep() {
	sudo grep -h "$today.*Ban " /var/log/fail2ban.log | tail -$number | awk -F[\ \:] '{print $19,$17}' | sort | uniq -c | awk '{cmd="curl -s https://ipvigilante.com/"$2"|jq -j \"[.data.city_name//empty, .data.country_name//empty] | @csv\"";cmd|getline country;close(cmd)}{cmd2="sudo grep "$2" /var/log/fail2ban.log | tail -1|cut -f1,2 -d \" \" --output-delimiter \"-\"";cmd2|getline timestamp;close(cmd2)}{print timestamp,$1,$2,$3,country}' | sort
}
printUsage() {
        printf "Parameters:\n"
        printf " -n[n] to list n ip addresses\n"
        printf " -t to show output for only today\n"
}
while getopts ":n:t" optname
  do
    case "$optname" in
      "n")
        printf "Option $optname has value $OPTARG\n"
	number=$OPTARG
        ;;
      "t")
        printf "Option $optname\n"
	today=`date +%Y-%m-%d`
        ;;
      "?")
	printUsage
	exit 0
        ;;
      ":")
        printf "No argument value for option $OPTARG\n"
	exit 1
        ;;
      *)
      # Should not occur
        printf "Unknown error while processing options\n"
	exit 1
        ;;
    esac
  done
if [ $OPTIND -eq 1 ]; then
        printUsage
        exit 0
else
  dogrep
fi