backup one file ( v2 )

#!/bin/bash

if [ -z "$1" ]

  then

    echo "No argument supplied"

exit

fi

FULLPATH=$(/usr/bin/readlink -f $1)

BASENAME1=$(/bin/basename $FULLPATH )

MYPATH=$(/usr/bin/dirname $FULLPATH)

backupdir="$MYPATH/backupdir"

mydate=$(date +"%m-%d-%y-%N")

if [ ! -d "$backupdir" ]; then

    mkdir $backupdir

fi

cp $MYPATH/$BASENAME1 $backupdir/$BASENAME1-$mydate

echo " copied to  $backupdir/$BASENAME1-$mydate"