showcon.sh

#!/usr/bin/env bash

#    showcon is a bash script for print TCP and UDP total connections
#    order ascendent by user

#    Copyright (C) 2013 by Ángel Guzmán Maeso, shakaran at gmail dot com

#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 3 of the License, or
#    (at your option) any later version.

#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#    GNU General Public License for more details.

#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

if [ `/usr/bin/id -u` -ne 0 ]; then
    echo 'Please, run this script as root'
    exit 1
fi

echo 'TCP'
lsof -nP | grep TCP | awk '{ print $3}' | sort | uniq -c | sort -n -r

echo 'UDP'
lsof -nP | grep UDP | awk '{ print $3}' | sort | uniq -c | sort -n -r