For those who missed it: https://www.gnu.org/fun/jokes/ed-msg.en.html

Doing edlin as high-school typing exam was already enough, and ed wasn't much better, which was an opinion shared by our customers back then.

And not installed by default in many distros. FML.

> And not installed by default in many distros. FML.

ed (pronounced as distinct letters, /ˌiːˈdiː/)[1] is a line editor for Unix and Unix-like operating systems. It was one of the first parts of the Unix operating system that was developed, in August 1969.[2] It remains part of the POSIX and Open Group standards for Unix-based operating systems

so it is a bug in those distros.