For installation instructions see the Section called Installing Texinfo-4.6 in Chapter 6.
Texinfo (4.6):
ftp://ftp.gnu.org/gnu/texinfo/
The Texinfo package contains programs used for reading, writing and converting Info documents, which provide system documentation.
Installed programs: info, infokey, install-info, makeinfo, texi2dvi and texindex
info is used to read Info documents. Info documents are a bit like man pages, but often go much deeper than just explaining all the flags. Compare for example man tar and info tar.
infokey compiles a source file containing Info customizations into a binary format.
install-info is used to install Info files. It updates entries in the Info index file.
makeinfo translates the given Texinfo source documents into various other formats: Info files, plain text, or HTML.
texi2dvi is used to format the given Texinfo document into a device-independent file that can be printed.
texindex is used to sort Texinfo index files.
Texinfo depends on: Bash, Binutils, Coreutils, Diffutils, GCC, Gettext, Glibc, Grep, Make, Ncurses, Sed.