The laptop my job provided me to write programs on has no home, end, pgup or pgdn keys. Which I find to be insane. I learned quickly that I just can't function

The laptop my job provided me to write programs on has no home, end, pgup or pgdn keys. Which I find to be insane. I learned quickly that I just can't function without an end key. So I remapped capslock to end and honestly it's been life changing. I just wish I could replicate this on my Linux machines now. I've built the muscle memory for it, but I have to hesitate every time to make sure I'm in windows where the key works. I'm sure it's possible, but none of the easy solutions I've tried so far have worked, and I'm not really willing to go tinkering in multiple config files hidden deep in the system. I need something more portable than that.