

if [ $# -lt 2 ] 
then
cat <<EOF
  usage $0 filename size_in_MB

careful !!  for inadvertently trunking (shortening) the file, unless that is what you want to do.....

EOF
exit 1
fi


[ $# -lt 2 ] && exit 1
dd if=/dev/zero of=$1 bs=1M seek=$2 count=0

