/usr/share/lifelines/desc-tex2/README is in lifelines-reports 3.0.61-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | desc-txt is a program to generate Descendent tree's in TeX.
Written by Eric Majani, modified by Pete Glassernbury, Jim Eggert
and D. Roegel.
Here is a short description of the files contained in this directory:
README        -> this file
desc-tex.ll   -> version 1 of desc-tex
desc-tex2.ll  -> version 2 of desc-tex
drsetup.tex   -> general personnalisation TeX macros 
                  (don't change this file; change mysetup.tex)
drtree.tex    -> modified tree macros for desc-tex2 
ex1.tex       -> an example showing how to merge two or more
                 trees ``by hand'' and using invisible nodes.
extree1.tex   -> Source of previous file. 
extree2.tex   -> Source of previous file.
mysetup.tex   -> Personal setup: feel free to modify this file.
poster.doc    -> source documentation of the poster macros
poster.tex    -> Tim Van Zandt's poster macros
poster1.tex   -> other poster macros
poster2.tex   -> other poster macros
pstricks.con  -> pstricks configuration file (you normally
                   don't need to change it)
pstricks.pro  -> prologue file for dvips
                   (needs to be put where dvips can find it)
pstricks.tex  -> Tim Van Zandt's pstricks macros.
setup.tex     -> some TeX macros used by version 1 of desc-tex
tree.tex      -> original tree macros for version 1 of desc-tex
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How to make it work ?
  - call the desc-tex2 report from Lifelines
  - answer the questions
  - generate a file <something>.tex
  - apply TeX (not LaTeX) to this file
  - preview it with xdvi or an other previewer
  - generate PostScript with dvips
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