Unison

Sync laptop desktop - ArchWiki

Interressante, simple. Méthode qui utilise usison pour garder votre ordinateur de bureau synchronizé avec votre laptop et autres appareils.

You need to have ssh on both machines, and unison installed on both machines (your laptop and desktop). Then with a few simple commands you can synchronise directories, and in a GUI you can select which things you wish to have synchronised and which not. You can also resolve conflicts.