The Unix Line Editor That Refuses To Die

The ed text editor is a relic from the dawn of Unix, yet it remains a mandatory requirement for modern systems. Even today, every Unix-like computer must include it to stay compliant with global standards.

Created in the early 1970s, ed was designed to edit text one line at a time back when computer terminals were slow and memory was scarce. Because it is so foundational, developers still include it in modern operating systems to ensure basic tools are always available during system repairs. It may feel ancient compared to modern visual editors, but its simplicity makes it virtually indestructible.