Shell Programming and Scripting

#! /bin/ksh
#
# This will take a look at all Filesystems NOT left out in the variable FILESYSTEM and
# then find all directoy sizes listed in that filesystem and print them to standard output
# in a formated output. All sizes are in kb.
#
# by: Optimus_P aka me not you
#
FILESYSTEM=`df|awk '{ print $7 }'|grep -v Mounted`
#FILESYSTEM="/ /export/home /var /tmp"
for FS in ${FILESYSTEM};do
        USED=`df -k |grep $FS|awk '{ print ($2-$3) }'`
        FREE=`df -k|grep $FS|awk '{ print $3 }'`
        cd $FS
        echo "-=Disk Spaceing Script (all sizes are in kb)=-"
        echo '\t' by: me not you
        echo DISK $FS
        echo
        echo TOTAL AVAILABLE $FREE
        echo
        echo USED:
        echo '\t' $FS
        for DIRECTORY in `ls ${FS}`; do
                if [[ -d $DIRECTORY ]]; then
                        du -s $DIRECTORY|awk '{ printf ("%25s\t%-10d\n", $2,$1) }'
                fi
        done
        echo TOTAL USED ${FS}"\t"$USED
        echo
done