The AWK command dates back to the early Unix days. It is part of the POSIX standard and should be available on any Unix-like system. And beyond.

While sometimes discredited because of its age or lack of features compared to a multipurpose language like Perl, AWK remains a tool I like to use in my everyday work. Sometimes for writing relatively complex programs, but also because of the powerful one-liners you can write to solve issues with your data files.