I've got two laptops which I want to keep as similar as possible and do backups on them.
What should I use just to have all files from one laptop on the other? How can I avoid data loss when I use both laptops?
For example changing Firefox history on both laptops without syncing? As far as I know, rsync etc. would discard changes of the older one, making syncing essential.
I don't want to use the cloud for obvious reasons.