For a long time I have made backups of my home partition by hand, starting from time to time rdiff-backup. But as you can imagine, this approach doesn’t generate regular and reliable backups.
I couldn’t put this task into a simple cronjob because of two reasons. First I use encrypted hard disks and my backup disk is connected via USB and not always on. So before a backup starts I have to turn on my backup disk and make sure, that my home partition and my backup disk is decrypted and mounted. Second I don’t want the backup happen during my regular work. In my experience such processes often starts in the most annoying moments.
So I decided that I need an semi-automatic backup, which runs during shutdown. The result is this small script which I put in /etc/rc0.d/K05backup.sh:
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#!/bin/bash currentTime=`date +%s` timeUntilNextBackup=604800 # 604800sec = 1week startBackup=false # check if it's time for the next backup if [ -f /var/log/nextBackup.log ]; then nextBackupTime=`cat /var/log/nextBackup.log` if [ $(($currentTime - $nextBackupTime)) -gt 0 ]; then startBackup=true #time for the next backup fi else startBackup=true fi if [ $startBackup == true ]; then echo "It's time for another Backup!" echo "Don't forget to switch on your backup hard disk before you start!" repeat=true while $repeat; do echo -n "Start backup procedure now? (y)es or (n)o? " read char case $char in [y,Y] ) if [ ! -d /home/schiesbn ]; then echo "encrypted HOME partition has to be mounted..." cryptsetup luksOpen /dev/sda6 secureHome mount /dev/mapper/secureHome /home fi echo "encrypted BACKUP partition has to be mounted..." cryptsetup luksOpen /dev/sdd1 secureBackup mount /dev/mapper/secureBackup /mnt/backup echo "Starting Backup..."; rdiff-backup --print-statistics /home/schiesbn /mnt/backup echo "umount backup disk..." umount /mnt/backup cryptsetup luksClose secureBackup # calculate the time for the next backup and write it to the log nextBackup=$(($currentTime + $timeUntilNextBackup)) echo $nextBackup > /var/log/nextBackup.log echo "DONE." sleep 10 #give me some time to look at the backup statistics repeat=false;; [n,N] ) repeat=false;; esac done fi
If the last backup is older than 1 week the script asks me, if I want to do another backup. Than I can decide to postpone it or to start it now. If I decide to start the backup procedure I get the opportunity to decrypt my backup and home partition before rdiff-backup starts. After that I can leave the room and be sure that the computer will shutdown after the backup is finished.
Until now this is the best and most reliable, least annoying and most automated solution I could found.