It’s just an euphemism, “DRM / License check” = “disease”.

Nice list, TIL about Ctrl+U and Ctrl+Y.

If I may add, Ctrl+X into Ctrl+E opens $EDITOR to edit the current line.

I believe, these are Emacs shortcuts. There’s also set -o vi in bash, but I’ve never used it, so can’t vouch for it.

Meanwhile plenty of software recommends doing this:

curl https://totallysafe.example/install.sh | sudo bash