Using CP in my backup script.
I'd like to change this script to use the cp (copy) command instead of tar so that it will do incremental backups without "tar-ing" all the files.
Does anyone have suggestions? Unfortunately, just replacing tar with cp does not work. The SCRIPT #!/bin/sh # full and incremental backup script # created 02 September 2004 # Based on a script by Daniel O'Callaghan #Change the 5 variables below to fit your computer/backup COMPUTER=deep # name of this computer DIRECTORIES="/home /etc /var /usr/local" # directoris to backup BACKUPDIR=/backups # where to store the backups TIMEDIR=/backups/last-full # where to store time of full backup TAR=/bin/tar # name and locaction of tar #You should not have to change anything below here PATH=/usr/local/bin:/usr/bin:/bin DOW=`date +%a` # Day of the week e.g. Mon DOM=`date +%d` # Date of the Month e.g. 27 DM=`date +%d%b` # Date and Month e.g. 27Sep # On the 1st of the month a permanet full backup is made # Every Sunday a full backup is made - overwriting last Sundays backup # The rest of the time an incremental backup is made. Each incremental # backup overwrites last weeks incremental backup of the same name. # # if NEWER = "", then tar backs up all files in the directories # otherwise it backs up files newer than the NEWER date. NEWER # gets it date from the file written every Sunday. # Monthly full backup if [ $DOM = "01" ]; then NEWER="" $TAR $NEWER -cf $BACKUPDIR/$COMPUTER-$DM.tar $DIRECTORIES fi # Weekly full backup if [ $DOW = "Sun" ]; then NEWER="" NOW=`date +%d-%b` # Update full backup date echo $NOW > $TIMEDIR/$COMPUTER-full-date $TAR $NEWER -cf $BACKUPDIR/$COMPUTER-$DOW.tar $DIRECTORIES # Make incremental backup - overwrite last weeks else # Get date of last full backup NEWER="--newer `cat $TIMEDIR/$COMPUTER-full-date`" $TAR $NEWER -cf $BACKUPDIR/$COMPUTER-$DOW.tar $DIRECTORIES fi |
cp doesn't really have a function for incremental backups. You would be better using rsync:
http://rsync.samba.org |
Oh, is it tar that gives the script above the ability to do incremental backups? Do you know any scripts that already work with rsync that I can use?
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Googling for rsync backup scripts reveals quite a few.
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Why not use "find" and "cpio" (and "compress" or ""zip") to do the incremental backup?
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I am open to all suggestions. Currently, I am reading up on rsync.
Would "find and CPIO" be a better approach? |
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