#!/bin/awk -F
#File's name: match.awk
#Author: Jen Chen
#Updated on: 
#Copyrighted by Jen Chen
#Comments: This awk script is used with the shell command "who"
#so that the first field contains the user's login name.

BEGIN{
}
{
  if($1 ~/jchen13/)
    printf ("%15s\t%15s\t%35s\n", $1,$4,$6)

# On the command line we can use the similar awk command as below
# to produce the same result:
# awk '{if($1 ~/jchen13/) printf("%15s\t%15s\t%35s\n", $1,$4,$6)}' loo 
      }