Shell Programming and Scripting

{
SOURCESVR=$1
DESTINATIONSVR=$2
DESTINATIONDIR=$3
MIGRATE_FILE_LIST=$4
SOURCEDIR=$5
SOURCELIST=$6

ssh user@DESTINATIONSVR " cd ${DESTINATIONDIR};ls *.sun >>SOURCELIST" #to log onto the destination server and listing the .sun
                                                                         files that have been copied from the source#
if [[ -r ${SOURCELIST} ]]; then
while read SOURCELIST;do
diff ${SOURCELIST} ${MIGRATE_FILE_LIST} >>diff.txt
done
fi

SOURCESVR=$1
DESTINATIONSVR=$2
DESTINATIONDIR=$3
DESTINATIONLIST=$4
SOURCEDIR=$5
SOURCELIST=$6

ssh user@$DESTINATIONSVR "cd $DESTINATIONDIR; ls *.sun" >> $DESTINATIONLIST #to log onto the destination server and listing the .sun files that currently exist
cd $SOURCEDIR; ls *.sun > $SOURCELIST #get list of .sun files that are on source
comm -13 $SOURCELIST $DESTINATIONLIST > dest_remove_list
ssh user@$DESTINATIONSVR "cd $DESTINATIONDIR; rm $(cat dest_remove_list)"   #log on to destination server and remove files that are not present on the source
cd $SOURCEDIR;
scp *.sun user@$DESTINATIONSVR:$DESTINATIONDIR/   #copy files from source to the destination server