>Have to download software
>>GNU/Linux
sudo pacman -S "software"
sudo pacman -Syyu to upgrade your software base
yaourt -S "some software tweak" (LaTeX document class, Kali's dm_crypt nuke tweak)
sudo pacman -S && yaourt -Syyua to upgrade everything
>>Windows
search on Google, download 5 executables, run them all (pic related)
have to run every program one-by-one for their built-in upgrade functionality
>Have to share files
>>GNU/Linux
cp /home/user/music/daft\ punk/ .mpd/music -R
cp /home/user/pictures/*.svg /run/media/sandisk # this copies every vectorial image to some cold storage
or drag'n'drop in Nautilus, Dolphin or whatever
>>Windows
Open two file managers, split both of them in half of the screen, copy, close, open your mails, you forgot to send some file, repeat
Have to know what processes are active on my computer
>>GNU/Linux
lspci
>>Windows
ctrl+alt+suppr. Wait 30 seconds. Click. Wait 30 seconds. Search in a small window a process, then put it in full size, then search again.
>Have to stop some processes
>>GNU/Linux
killall gajim
>>Windows
See >Have to know what processes are active on my computer
>Have to edit a config file
>>GNU/Linux
nano .ncmpcpp/config
vim .ncmpcpp/config
>>Windows
meta + r, then %appdata%, then search for it in the least user-friendly files browser in the whole galaxy.
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I haven't used macOS or anything earlier so I can't say anything about that.