Info pages
From wikinotes
GNU's successor to man pages.
Supports links between pages.
Built using texinfo.
Documentation
official docs https://www.gnu.org/software/texinfo/manual/texinfo/html_node/index.html home https://www.gnu.org/software/texinfo/
Tutorials
gentoo wiki https://wiki.gentoo.org/wiki/Info
Usage
info --vi-keys bash # show bash manual