Sometimes is useful to sync automatically files over the net between 2 or more computers, maybe you want to keep some configuration files aligned on different servers or maybe you have a cluster of web servers and you want to keep their document root aligned so your customer will always see the same result.
You could do this with a network filesystem like NFS, GlusterFS or Coda File system. But why do complicated things when you could easily do this just keeping in sync the local filesystem ?
In a former article I’ve talked about Unison to do a work like that, and it works, the limit of Unison is that you can have just 2 nodes, but if you have more nodes you have to use a different solution like the one i present you today: csync2