My Favorite Backup Method DD BZIP SSH Script

By April 8, 2013Featured, Sample Work

Backup today can be a PITA.  It takes too long, and too much work to automate.  That’s what makes this single line backup script one of my favorites. It creates a compressed DD image a remote server in the form of a BZ2 archive. This command is run locally from the machine you want to backup.

Let’s begin:
First, create your file
nano xf

Inside xf, paste the following:

dd if=/dev/vda1 of=/dev/stdout bs=1M | bzip2 | ssh "cat - > /home/backups/Live.img.bz2"

Let’s break this down, so you can create your own command!

First, start by doing a df -a to determine the name of your disk, replacing /dev/vda1 with the disk you want to backup.

Second, change to your remote server. For best practices you should exchange SSH keys so there is no password prompt. See this tutorial here to exchange keys.

Finally, change /home/backups/Live.img.bz2 to the destination directory and filename you would like on the remote server.

Run the script in a shell to test, and finally automate.

Be sure to make your script executable by running chmod +x after creation. To run in the background, install apt-get install nohup. This will allow you to start your backup script in the background, allowing it plenty of time to execute. nohup ./scriptname & will run the script as a daemon.

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