↳ In-reply-to » I remembered cu is next to vi in the "impossible to quit software" list.

@adi@twtxt.net Hmm, I never heard of that one before. The debian package description says:

The cu command is used to call up another system and act as a dial-in
terminal (mostly on a serial line). It can also do simple file transfers with
no error checking.

cu is part of the UUCP source but has been split into its own package because
it can be useful even if you do not do uucp.

I’m wondering what are you using it for?