Hello, > I was looking at this rotating backup script > > source: > https://community.spiceworks.com/topic/34970-how-to-create-rotating-backups-of-files > > ----------backup script---------------- > BACKUPDIR=`date +%A` > OPTS="--force --ignore-errors --delete-excluded --exclude-from=$EXCLUDES > --delete --backup --backup-dir=/$BACKUPDIR -a" > > export PATH=$PATH:/bin:/usr/bin:/usr/local/bin > > # the following line clears the last weeks incremental directory > [ -d $HOME/emptydir ] || mkdir $HOME/emptydir > rsync --delete -a $HOME/emptydir/ $BSERVER::$USER/$BACKUPDIR/ > rmdir $HOME/emptydir > > # now the actual transfer > rsync $OPTS $BDIR $BSERVER::$USER/current > -------end backup script---------------- > > Can anybody explain why they they "...clear the last weeks incremental > directory"?
Probably because BACKUPDIR is set to the name of the day (`date +`A`). Today is Tuesday and a backup is done, next week the backup will be overwritten because BACKUPDIR will also be Tuesday. Therefore there will only be 7 directories. > Doesn't "rsync --deleate" option take take care of this? --delete removes extraneous files. Combined with the previous thing, it ensures the backup rotation. > Does it have something to do with Windows? Hu? What is Windows? I do not know what are those alternative OSs ;) Regards, JC
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