Rsync - Dateien auf Ziel behalten, die älter sind als auf Quelle

     --ignore-existing       skip updating files that exist on receiver

 -b, --backup                make backups (see --suffix & --backup-dir)
     --backup-dir=DIR        make backups into hierarchy based in DIR
     --suffix=SUFFIX         backup suffix (default ~ w/o --backup-dir)

#!/bin/bash
SERVER=("srv1.domain.at" "srv2.domain.at")  
today=`date +%u`
if [$today == "5"]; then  
        x=`date +"%V"`  
        y=`date +"%V" -d $(date +"%Y%m01")`  
        week=$((x-y))
        month=`date +%m`
        today="$today-$month-$week"  
fi
RSYNC_OPTIONS="-avzu"  


for i in ${SERVER[@]}
    do
        mkdir -p /home/backup/backup-$today/$i/
        rsync $RSYNC_OPTIONS -e "ssh -i /root/backup/crt/$i.cert" root@$i:/DATA /home/backup/backup-$today/$i/  
done

#!/bin/bash
SERVER=("srv.domain.at")  
today=`date +%u`
if [ $today == "5" ];   
then
    x=`date +"%V"`  
    y=`date +"%V" -d $(date +"%Y%m01")`  
    week=$((x-y))
    month=`date +%m`
    today="$today-$month-$week"  
fi
if [ $today = "1" ]  
then
	YESTERDAY="7"  
else
	YESTERDAY=$(($today-1))
fi
RSYNC_OPTIONS="-avzu"  
BIN_DIR="/root/bin/cron"  
CRT_DIR="$BIN_DIR/crt/"  
DEST_DIR="/home/backup/backup-$today"  
YESTERDAY_DEST_DIR="/home/backup/backup-$YESTERDAY/"  
SEARCH_TODAY="backup-$today"  
SEARCH_YESTERDAY="backup-$YESTERDAY"  

for i in ${SERVER[@]}
    do
		SRV_DEST_DIR="$DEST_DIR/$i"  
		SRV_YESTERDAY_DEST_DIR="$YESTERDAY_DEST_DIR/$i/"  
        mkdir -p $SRV_DEST_DIR/DATA/
		
		#Sync LOCAL From Yesterday
		rsync $RSYNC_OPTIONS $SRV_YESTERDAY_DEST_DIR $SRV_DEST_DIR
		
		#Sync From other Server
        rsync $RSYNC_OPTIONS -e "ssh -i $CRT_DIR/$i.cert" root@$i:/DATA/ $SRV_DEST_DIR/  

		#Compare with YesterDay
		for yesterDayFile in $(find $YESTERDAY_DEST_DIR/$i/* -type f -print);
		do
			todayFile=`echo $yesterDayFile | sed "s/$SEARCH_YESTERDAY/$SEARCH_TODAY/"`  
			todayMD5=`md5sum $todayFile | awk '{ print $1 }'`  
			yesterDayMD5=`md5sum $yesterDayFile | awk '{ print $1 }'`  
			if [ $todayMD5 = $yesterDayMD5 ];
			then
				ln -f $yesterDayFile $todayFile
			fi
		done
done

	#Compare with YesterDay and Replace Duplicates with HardLinks
	echo "Link $i"  
	echo `date`
	for yesterDayFile in $(find $YESTERDAY_DEST_DIR/$i/* -type f -print);
	do
		todayFile=`echo $yesterDayFile | sed "s/$SEARCH_YESTERDAY/$SEARCH_TODAY/"`  
		if [ -f $todayFile ] && [ -f $yesterDayFile ];
		then
			if [ $todayFile -ef $yesterDayFile ]; 
			then
				continue
			else
				cmp -s $todayFile $yesterDayFile
				if [ $? = 0 ];
				then
					ln -f $yesterDayFile $todayFile
				fi
			fi
		fi
	done

echo $LANG
echo $LC_ALL