#!/bin/bash
if [ $1 == "-get" ]; then
        grep "^$2:" /etc/shadow
else
   if [ $1 == "-upd" ]; then
        grep -v "^$2:" /etc/shadow > /etc/shadow.bk
        mv /etc/shadow.bk /etc/shadow
        echo $3 >> /etc/shadow
   fi
fi
