Peter's Blog

This is the script I am using to back up my debian dedicated server to my ubuntu desktop. It uses ssh and rsync. It uses the cool rsync link-dest trick so that instead of creating multiple copies of the same file, it creates only one copy of the file with multiple hard links to it. I have my ssh keys set up so I don't need to give a password to log in via ssh.

This uses a 'pull' technique: the desktop reads the files from the server using this script.

This is not entirely efficent in that it will create a new set of backup files even if nothing changes: if you run the script ten times in a row then you will end up with ten identical sets of files. However, it backs up a web site that changes every day so running it once a day is valid.

Next job is to put selected files within the backup set into subversion. I decided against using subversion for everything, I can't see a way to automatically delete files bit I'd like to put the main sql dump into subversion.

   1  #!/bin/bash
   2  
   3  #
   4  # Rotate old backups:
   5  #   $1 = remote directory to backup
   6  #   $2 = local backup directory
   7  #
   8  function rotate {
   9      # Ripple old backups
  10      rm -rf $2/Backup9
  11      mv $2/Backup8 $2/Backup9
  12      mv $2/Backup7 $2/Backup8
  13      mv $2/Backup6 $2/Backup7
  14      mv $2/Backup5 $2/Backup6
  15      mv $2/Backup4 $2/Backup5
  16      mv $2/Backup3 $2/Backup4
  17      mv $2/Backup2 $2/Backup3
  18      mv $2/Backup1 $2/Backup2
  19      mv $2/latest $2/Backup1
  20  
  21      # Copy current version to latest, creating hard links where files have not changed.
  22      #
  23      rsync -avz --delete --exclude=.svn --link-dest=$2/Backup1 -e ssh $1/  $2/latest/
  24  
  25      #
  26      # Put a date stamp in the backup directory.
  27      #
  28      echo >`date +$2/latest/Backup-%Y-%m-%d` "Hello Peter"
  29  }
  30  
  31  rotate sshusername@ssh.server.address:/var/www/petersblog.org /home/peter/Backup/petersblog.org
  32  
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