Script for backing up a Mac OS X folder to an encrypted disk image on a remote AFP server. You must first create the encrypted disk image using Disk Utility. I recommend making it a sparsebundle for better use of space and performance. You can run this with cron and append the output to a log file. Modify the `rsync` command to exclude subdirect…

backup to encrypted diskimage on remote AFP server.sh

#!/bin/bash

echo =====================================
echo `date` Backing up Documents

# The URL to your remote AFP server. You can test your URL using command-K in the Finder. 
AFP_URL=afp://user:password@afp.server.com/Share

# The place where the AFP server is mounted. By default this will be in /Volumes someplace.
AFP_DIRECTORY=/Volumes/Share

# A path relative to `AFP_DIRECTORY` where the encrypted disk image can be found. Create this yourself 
# with Disk Utility as an encrypted sparsebundle Disk Image. Be sure to make the maximum size large enough.
IMAGE_PATH=backups/Backups.sparsebundle

# The password you used when you create the disk image. 
IMAGE_PASSWORD=disk_image_password

# Where the encrypted disk image is mounted when you open it in the Finder. Usually this will be somewhere in /Volumes.
IMAGE_MOUNT_POINT=/Volumes/Backups

# The directory you'd like to back up. 
BACKUP_DIRECTORY=/Users/koehn/Documents

# Mount the remote AFP volume. We need to create the local directory where the mount will occur.
mkdir -p "$AFP_DIRECTORY"
mount_afp "$AFP_URL" "$AFP_DIRECTORY"

# Mount the backup image. In this mode the user must enter the password on the command line.
# Here we DON'T need to create the directory where the mount will occur. Go figure. 
echo -n "$IMAGE_PASSWORD" | hdiutil attach -stdinpass "$AFP_DIRECTORY/$IMAGE_PATH"

# Backup the software to the remote encrypted volume using Apple's rsync 2.6.9 from 2006.
# rsync -avE --exclude .DS_Store "$BACKUP_DIRECTORY" "$IMAGE_MOUNT_POINT"

# Use this if you manually installed the (better) rsync 3.1.0 or later (limits bandwidth to 500KB/s)
/usr/local/bin/rsync -aviAEX --bwlimit=500 --delete --exclude .DS_Store "$BACKUP_DIRECTORY" "$IMAGE_MOUNT_POINT"

# Unmount the encrypted disk image.
hdiutil detach "$IMAGE_MOUNT_POINT"

# Unmount the remote directory (will delete the directory we crated with `mkdir` above).
diskutil unmount "$AFP_DIRECTORY"

echo `date` Done backing up Documents