1. TeTeX is an implementation of TeX for Linux or UNIX systems. TeX takes a text file and a set of formatting commands as input and creates a typesetter-independent .dvi (DeVice Independent) file as output. Usually, TeX is used in conjunction with a higher level formatting package like LaTeX or PlainTeX, since TeX by itself is not very user-friendly.Install tetex if you want to use the TeX text formatting system. If you are installing tetex, you will also need to install tetex-afm (aPostScript(TM) font converter for TeX), tetex-dvilj (for converting.dvi files to HP PCL format for printing on HP and HP compatible printers), tetex-dvips (for converting .dvi files to PostScript format for printing on PostScript printers), tetex-latex (a higher level formatting package which provides an easier-to-use interface for TeX), and tetex-xdvi (for previewing .dvi files in X). Unless you are anexpert at using TeX, you should also install the tetex-doc package, which includes the documentation for TeX. From Redhat 8.0 RPM