Finding What Process is Binding Network Socket / Port

I found a very usefull site for this purpose. It guide you step by step on how to find the process.

http://linux-sxs.org/networking/portnumid.html

From the site, I wrote a script to ease the process.

#!/bin/bash
#
# Script to find what process is binding to which network socket
# Usage
#    portowner <port>
#    portowner all
#
# Author
# Mohd Izhar Firdaus Ismail <kagesenshi.87@gmail.com>
#

findproc(){
        PIDS=`fuser -n tcp $@ 2>/dev/null`
        echo "--------------"
        echo "Port $@"
        ps $PIDS
        echo "-------------"
}

if [ "$1" == "" ];then
        echo "Usage:"
        echo "   $( basename $0 <port> ) "
        echo "   $( basename $0 ) all"
elif [ "$1" == "all" ];then
        PORTS=`netstat -na|grep tcp\
                |grep LISTEN|sed s/"\:\:\:"/"0.0.0.0\:"/g \
                |sed s/"\:"/" "/g|awk '{print $5}'|sort|uniq`
        for PORT in $PORTS;do
                findproc $PORT ;
        done
else
        for PORT in $@;do
                findproc $PORT ;
        done
fi

- Izhar Firdaus -