Which directories should I backup in Linux?

[ts678]

Welcome to the forum @Uptime

@Uptime

if anyone could also point me to any applicable threads I would appreciate it.

This one has some ideas, but don’t limit yourself to the Duplicati forum.
You’re asking a pretty generic question, so web search could also help.

How to backup everything installed on a Debian server

Hello, Firstly, I apologise if my question is a stupid question. I configured Duplicati using the docs, successfully, on my Debian 11 server. I am now trying to find a way to backup everything I installed on my server, without the things that are natively installed (to reduce the amount of data, especially useless). I am just wondering if a way to do this exist, because if I just backup “/”, after counting the files, Duplicati says that there is 128 TB of data in the status bar (even if I ha…