Shell Programming and Scripting

port         process              files
port1        pr1                    #of files   
port2

#!/bin/bash
echo
echo This script will find all the open ports on a computer.
echo It will also show the process that has opened each one and the number of files opened per process.
echo
echo

showProcesses()
{
	netstat -atuv | awk '{print $4}' > ports.list
	lsof -i < ports.list | awk 'NR>1{print $1}'
}

showNumberOfFiles()
{
	lsof -i < ports.list | awk 'NR>1{print $2}' > files.list
	while read pid; do
	lsof -p $pid | awk '{print $1}' > numberoffiles.list
	wc -l < numberoffiles.list
	done < files.list
}

echo Open ports on your computer:
echo

netstat -tuv | awk 'NR>2{print $4}'

echo
echo
echo Processes on each port:
echo

showProcesses

echo
echo
echo Number of files per process:
echo

showNumberOfFiles

$ echo "Hai" | nawk '{
> printf("==========================================\n");
> printf("|%10s|%10s|%10s|%10s|\n","11","12","13","14");
> printf("|%10s|%10s|%10s|%10s|\n","21","22","23","24");
> printf("==========================================\n");
> }'

==========================================
|        11|        12|        13|        14|
|        21|        22|        23|        24|
==========================================