Anonymous
seaken64, the page you linked to, it has the reader jumping through hoops
(site registrations, download “ebooks”, find a suitable “ebook reader” program…)
I’ll suggest this as a starting point: tldp.org (The Linux Documentation Project)
The TDPL basic linux guide, bash bash guide, advanced bash guide
For debian -centric documentation: http://wiki.debian.org/
Because some of the material in debian wiki nowadays does focus on systemd, I don’t recommend reading the wiki as a “starting point” but it will be a valuable source of info for later learninig (also wiki.archlinux.org ~~ useful later, but can confuse a new debianite or antiX user who doesn’t yet recognize that some details mentioned in arch wiki do not apply, universally, across various distributions.)
i have a pm?
indeed, this forum’s PM notification is easily missed