Shell Programming and Scripting

##script to check if file sys has reached threshold.

FILESYS=/home/Arsenal
LINE=`du -h $FILESYS | awk '{print $1}'`
TRSHOLD=50

if [ $LINE -ge $TRSHOLD ]
then echo "Your file system is running out of space"
else echo "current usage of space= `expr $TRSHOLD - $LINE`"
fi

kb=$(du -sk $FILESYS || awk '{print $1}' )
overlimit=$(echo $kb | awk -v lim=50 '
              { limit=50*1024 *1024 *1024
                 kb=$0 * 1024
                 if(kb>=limit){
                   {print "Y"}
                 else
                   {print "N"} ' )
[ $overlimit = "Y" ]  && echo 'WARNING DISK FULL' || echo 'disk ok'