I want to do this without internet connection, as I go where I don't have internet?
For arch-based what's the command to download and after that how do I install packages from terminal?
How to write a script to automate installation?
I also cannot change my backlight in manjaro, as backlight files not found running legacy bios, but in laptop it changes using fn key, although in manjaro I don't have backlights files there too. I want to do this without any utility, I know files are located somewhere else as the fn key works!!