![](/static/66c60d9f/assets/icons/icon-96x96.png)
![](https://lemmy.ml/pictrs/image/q98XK4sKtw.png)
Unless you’re specifically wanting to play with a different OS then Debian again. Makes much more sense to be using the same version of Linux and all the software ypu use rather than potentially different versions.
Also it will be simpler to maintain as everything is the same.
If you do want to play / test another distro then Mint has a low learning curve. FreeBSD is more different but you could easily try it and switch to something else if you don’t like it. Its different but not so much that linux users would feel totally lost.
Probably the most confusing thing for linux user trying FreeBSD is that Bash is not installed, and BSD uses sh instead by default. Bash can be easily installed and set as the default shell which will give a lot more familiarity. But otherwise it’ll feel like a familiar modern complete system, and you can use the same desktop environments you’re familiar with already in linux.
EDIT: You did say “backup” in your title. If that’s the main use case then definitely Debian again. If your laptop breaks or is stolen it makes sense to have a familiar system to pick up. Also important to sync and backup your data so it can be picked up on the other laptop. If backup machine is your focus then I’d say same OS and look more into data retention and retrieval between the two laptops, and ensure your important data is continuously backed up.
Atomic systems or rpm-ostree is an interesting concept and may well be the future of distributing linux, but it has a lot of compromises. It may not be the first place to start when leaving windows.
The problem is all the apps and things you may wish to do with your OS. Flatpak is the preferred method of installing apps as it doesn’t interfere with the OS, but that is a compromise that means more overhead for running apps including memory and disk space, and less integration with the host OS than traditional apps.
You can overlay native apps but the more you overlay onto the immutable os, the more complex upgrading gets and the risks of breaking stuff.
I’m not sure I would be starting with an immutable OS when switching away from windows. While it has a lot of theoretical benefits, its a work in progress and with significant compromises at the moment. Your VPN may just be the first of many programmes you find you need to overlay.
I personally would look at a more traditional install, get it working how you like and if you find Linux works as a permanent home then think about how you might recreate that with an immutable OS base. If your needs a re very simple then maybe it’ll be easy, but if you’re using lots of software and tools (particularly if its not available Flatpak) or custom OS config you may find atomic desktops are not yet quite ready for you.
It could be frustrating and off putting if you try linux immutable, find loads of problems and attribute that to linux when its actually the immutable OS that’s the cause.