To be honest, I've never used or heard of a keyboard or mouse that doesn't work with Linux. The space is pretty well standardized so generic drivers work for everything. I don't have experience with keyboard layouts that aren't English QWERTY, though. The safest option would be something basic from a major brand, extra stuff like RGB is not 100% guaranteed to work.

Any keyboard is going to work. As Ipacial said not all rgb stuff will work but basically any major brand works with open rgb at this point. I personally have a razor keyboard that I can control the lights with open rgb. I have a Logitech mouse that does not have rgb and I control the dpi with solaar.

Keychron K4v2 with SonixQMK can be customized to anything you want. I daily it in Linux and windows. I game in Linux, and work in windows (bleh) but I still want Macro's to pass the HID port on my KVM so I just build custom key codes.

Any of the QMK/VIA supported boards are great in linux, so find the layout, and style you want. The K series are the older ones and they require more effort to get QMK running since they run on the Sonix/Evision MCU.

As for mice, i have a Glorious D- because I have small hands, and its fine. I could control it with OpenRGB but I dont care enough and it gets messy with a KVM.

Just chiming in to say that any ISO keyboard can be whatever flavor of ISO you pick, based on your selection in the OS. You may want keycaps to match, but that’s really it, as far as hardware goes.

I bought a Havit keyboard which is considered half mechanical a couple of years ago. Maybe they have something similar or even more silent now.

I recently built a custom keyboard by getting Keychron Q6 and Ducky One 3 PBT keycaps, the space is slightly tight if it's not placed evenly, but they work and have shine-through! for the switches you should do your own research, since I like tactile :)

Anyway the keyboard works via the browser app VIA which is open source

https://github.com/the-via

edit: check maxgaming if you're nordic. they have decent selection, it's where I got my Q6

I would like to suggest my wooting keyboard. It is not quiet but i think their switches should qualify as linear. Not sure about the layout but I have the german layout so that might be a "yes"? I have the 100% variant. Sorry, i am not very deep into keyboards.

Their config tool is basically a website, so as long as you have a browser with webusb support on a system it works. Had some problems with the udev rules (most likely a "me" problem), so I used the desktop version instead.

Bonus you get is that the switches are an analog input. So you can change mode to analog and have like "slow walking" in games. Though, I have not tested that yet.

BUT it is hella expensive.

I also have cheap paddles (i think that that is the right word?) off amazon i use often. But the "support" is basically that the config is saved on the device so you config it once in wndows and that was it. I just bound it to random keys once and assign them in games. Would need to dig up what the paddles are called though.

You can use pretty much any keyboard but I would recommended a keyboard that is not by a major company that has its own property software

I have a corsair k55 and the extra keys on the left they are useless because if your plug this keyboard into a PC that hasn't corsairs icue installed it goes into " compatibility mode " aka the keyboard forgets your custom settings and keybinds

If you want something budget for a mouse, I got the darmoshark m3. It's only $43, 58 grams, works wired, with a dongle, and through Bluetooth, 1000 hz polling rate, and it works out of the box with no software required. It has buttons on the bottom of the mouse to switch DPI and polling rate. Just make sure you set it to 1000 hz since it's set to 500 hz by default I believe