Sync files between 2 remote computers using Linux terminal

Question

I want to be able to synchronise files between 2 remote computers in both directions. Say for example that I want to synchronise my /home/Documents directory with <username>@example.com:/home/Documents

What's the easiest way to update the folders in both directions, so that new/updated files on my home computer get transferred to the remote computer, and new/updated files on the remote computer get transferred to my home computer?

Answer 1

You can use Unison. Here are some guides:

• Using Unison to Synchronize Two Directories
• File Synchronization with Unison
• Synchronize computers with Unison
• Synchronizing 2 Ubuntu Systems with Unison

Answer 2

I use rsync (over ssh), just because it's easy and simple.

To sincronize two ways, you can do two commands, like this:

rsync --recursive --progress --partial --rsh=ssh /home/Documents <username>@example.com:/home/Documents
rsync --recursive --progress --partial --rsh=ssh <username>@example.com:/home/Documents /home/Documents

EDIT: I've just remembered somebody suggesting duplicity at a sprint. As the home page states, duplicity is an "encrypted bandwidth-efficient backup using the rsync algorithm".