[teddyh]

Why on Earth would you use a Google Books link for something in the TLDP? Here is the equivalent canonical link:

http://tldp.org/LDP/abs/html/exit-status.html (HTML)

http://tldp.org/LDP/abs/abs-guide.pdf#page=57 (PDF)

[gavinpc]

Thanks, I did search a bit and at any rate couldn't find an actual source for the quote itself.

[teddyh]

A simple search gave me the apparent original source for the quote; an article titled Bash — The GNU Shell, first published in the Linux Journal in 1994:

https://www.linuxjournal.com/article/2800

The latest revision of that text seems to be available here:

https://tiswww.case.edu/php/chet/bash/article.pdf