who -u | cut -c 1-10,38-50 > /tmp/idle$$

for idleSession in `cat /tmp/idle$$ | awk '{print $3}'`
do

    if [ "$idleSession" -gt 30 ]; then
       echo  $idleSession
    fi
done

user_test.sh: line 6: [: 14:25: integer expression expected

who -u | cut -c 1-10,38-50 > /tmp/idle$$

for idleSession in `cat /tmp/idle22 | tr ":" " " | awk '{print $4}'`
do
    if [[ $idleSession -gt 40 ]]
    then
         echo "$idleSession"
    fi
done

for idleSession in `cat /tmp/idle22 | awk '{print $3}'`
do
    comp=`cat /tmp/idle22 | tr ":" "n" | awk '{print $3}'`+`cat /tmp/idle22 | tr ":" "n" | awk '{print $4}'`
    if [[ $comp -gt 30 ]]
    then
         echo "$idleSession"
    fi
done