Shell script that determines the period for which a specified user is working on the system

					echo “enter the login of the user”
read name
logindetails=`who|grep –w “$name” | grep “tty”
if [ $? –ne 0 ]
echo “$name has not logged in yet”
loginhours=`echo “$logindetails” | cut –c 26,27`
loginminuts=`echo “$logindetails” | cut –c 29-30`
hoursnow=‟date | cut –c 12,13`
minnow =`date | cut –c 15,16`
hour=`expr $loginhours - $hoursnow`
min=`expr $loginminuts - $minnow`
echo “ $name is working since $hour Hrs - $min Minuts”

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