Emacs - Installing the full Manual
Lubuntu 20.04.2 ships with the Emacs text editor but not the Manual for it. It has the Frequently Asked Questions (FAQ) file but not the full Manual. Consequently, if you type on the command line info emacs
it tells you “no menu item ‘emacs’.”
To install the full manual go to the GNU Emacs website and get the manual from this page: GNU Emacs manual - GNU Project - Free Software Foundation (FSF) Select the “Info document” option from the list of available formats. You will get a file called emacs.info.gz . Put it in /usr/share/info/emacs/ . Do not unzip it; the info reader expects to find it zipped.
Now if you type info emacs
on the command line it will display the Emacs Manual, which you can navigate through using the regular info commands.