[anthk]

From Mark Burguess I'm reading:

- The Unix Programming Environment (not that one; this one it's a bit more modern). You'll get a bit of Perl instead of AWK, but it's fine.

- The GNU C Tutorial. Not as good as 'The C programming language'; but still useful.

- A shot Introduction To Operating Systems. Slightly outdated C++, because most of the time the issue it's just about fixing the include headers.

Most of the things learned there will work as is as Perl5, ANSI C/GNU C and so don't change a lot over time, if any.