Thanks to its ubiquity on servers, there are a couple excellent physical Linux backup solutions on the market. Cloud computing has also gotten a fair amount of attention recently, bringing with it several Linux backup solutions.
rsync and luckyBackup: Ultimate Backup Flexibility
This terminal-based program is the gold standard of Linux backup solutions, allowing users to clone files and directories between different devices in just about every way imaginable. Most servers in use today are backed up using shell scripts to control this program. luckyBackup is a frontend that makes rsync’s functionality more accessible, while adding features like email notifications.
DejaDup: The Easiest of the Physical Linux Backup Solutions
On the opposite end of the spectrum is Gnome-based DejaDup. This program uses wizards to guide users through the backup process to make it as painless as possible. Once set up, the window has just two buttons: “backup” and “restore.”
Dropbox: The Leader in Cloud-based Linux Backup Solutions
One of the first cloud-based Linux backup services, this service has a simple file manager-based interface, letting users specify which folders should automatically be backed up on their servers. Packages for the installer are available for Debian, Ubuntu and Fedora, while the source code is also available to compile for other distros. 2GB of storage is free, and more can be added for a fee.
Ubuntu One: Easy to Use, Hard to Install
Functionally, Canonical’s own Linux Backup Solution is nearly identical to Dropbox, and is already installed in most forks of Ubuntu. It integrates seamlessly with Nautilus, letting users sync folders with the service with a couple clicks. It can also work in tandem with Ubuntu’s music store, letting users keep their audio files on hand anywhere.
Unfortunately, clients aren’t readily available: Outside Ubuntu, there are clients for Windows, Android, and iDevices. The underlying client software is open source, permitting other distributions to port it to their own platforms, but for now no one else provides official support.
SpiderOak: The Most Secure of the Linux Backup Solutions
Another Dropbox-like service, it doesn’t have an open source client, but unlike the other Linux backup solutions, it has native support for Slackware and OpenSUSE. Data going to and from the service is encrypted, making it unviewable even to SpiderOak’s own employees.