gomo@ciabatta:~/facultad/algo2/tp2/Algo2-LaTeX/packages/tad$ ls               
tad-test.tex  tad.sty
gomo@ciabatta:~/facultad/algo2/tp2/Algo2-LaTeX/packages/tad$ head -10 tad-test.tex 
\documentclass[a4paper]{article}
\usepackage[spanish,activeacute]{babel}
\usepackage{tad}

\hoffset=-1.5cm
\textwidth=16cm
\parskip=1ex

\begin{document}

gomo@ciabatta:~/facultad/algo2/tp2/Algo2-LaTeX/packages/tad$ tex tad-test.tex 
This is TeX, Version 3.141592 (Web2C 7.5.4)
(./tad-test.tex
! Undefined control sequence.
l.1 \documentclass
                  [a4paper]{article}
? x
No pages of output.
Transcript written on tad-test.log.
gomo@ciabatta:~/facultad/algo2/tp2/Algo2-LaTeX/packages/tad$