Script to backup a Raspberry Pi disk image

Script developed on the RaspberryPi.org forums: The Raspberry Pi Backup Thread. The script, as copied over to github.com, was primarily written by user: jinx. I found this via a raspberrypi.stackexchange.com answer by user: ppumpkin.

The script was taken from here, a post from Mon Nov 10, 2014 7:05 am. I copied the attached file on Wed Feb 01, 2017 to this git repository.

bkup_rpimage.sh v1.0 by jinx

• bkup_rpimage.sh start [-cslzdf] [-L logfile] sdimage
• bkup_rpimage.sh mount [-c] sdimage [mountdir]
• bkup_rpimage.sh umount sdimage [mountdir]
• bkup_rpimage.sh gzip [-df] sdimage

• start - starts complete backup of RPi's SD Card to 'sdimage'
• mount - mounts the 'sdimage' to 'mountdir' (default: /mnt/'sdimage'/)
• umount - unmounts the 'sdimage' from 'mountdir'
• gzip - compresses the 'sdimage' to 'sdimage'.gz

• -c creates the SD Image if it does not exist
• -l writes rsync log to 'sdimage'-YYYYmmddHHMMSS.log
• -z compresses the SD Image (after backup) to 'sdimage'.gz
• -d deletes the SD Image after successful compression
• -f forces overwrite of 'sdimage'.gz if it exists
• -L logfile writes rsync log to 'logfile'
• -s define the size of the image file

Start backup to rpi_backup.img, creating it if it does not exist:

bkup_rpimage.sh start -c /path/to/rpi_backup.img

Start backup to rpi_backup.img, creating it if it does not exist limiting the size to 8000Mb

bkup_rpimage.sh start -s 8000 -c /path/to/rpi_backup.img

Use the RPi's hostname as the SD Image filename:

bkup_rpimage.sh start /path/to/$(uname -n).img

Use the RPi's hostname and today's date as the SD Image filename, creating it if it does not exist, and compressing it after backup:

bkup_rpimage.sh start -cz /path/to/$(uname -n)-$(date +%Y-%m-%d).img

Mount the RPi's SD Image in /mnt/rpi_image:

bkup_rpimage.sh mount /path/to/$(uname -n).img /mnt/rpi_image

Unmount the SD Image from default mountdir (/mnt/raspi-2014-11-10.img/):

bkup_rpimage.sh umount /path/to/raspi-2014-11-10.img