As I started to develop on a Raspberry Pi under Raspbian I needed to find a way to back up the system I’m working on.
I will try to set up this using the linux command rsync.
If not yet installed just run this command:
sudo apt-get install rsync
Set up File to Exclude Directories not Needed
Excluded from a backup should be (* will have those directories created on the target media but kept empty):
/proc/* /sys/* /dev/* /boot/* /tmp/* /run/* /mnt/* /media/*
Name this file rsync-exclude.txt and put it in a directory you might call backup in your /home/pi directory.
Using rsync Manually
For now I want to run rsync manually from a remote Computer via ssh as I am still in development and want to manually keep track of my snap shots.
The basic rsync syntax is:
rsync [OPTIONS] SOURCE(S) TARGET
The option -a takes care that all rights and users are transferred to the target medium.
To backup my Pi that I access by SSH from remote to an attached USB storage I use this command:
sudo rsync -aHv --delete --exclude-from=backup/rsync-exclude.txt / /mnt/backupdirectory
Make sure that you have mounted the USB device before to /mnt by the following commands.
Find out your devices’ name:
sudo fdisk -l
You will find something like /dev/sdb1 as the name of your device. Then mount it using that name:
sudo mount /dev/sdb1(e.g.) /mnt
Resources I’ve Been Using to Learn This:
in German: https://wiki.ubuntuusers.de/rsync/