use Caps Lock as CTRL on Linux

Why would that be useful?

@dpashkevich give it a try for a week and let me know,
if you are spending a lot of time in the shell, emacs or vim it turns out to be REALLY useful :)

I spend some time in the shell but probably not as much as you do :) And I don't use vim or emacs.

So does this reduce finger strain or you do the remapping because you want to use ctrl for something else?

It greatly reduces finger strain, having an easier-to-reach Ctrl is really useful if you get used to it and it also prevents you to accidentally activate Caps-Lock ( that can lead to bad behavior, especially in VIM :D )