%%
%% The LaTeX Companion, 3ed
%%
%% Example 4-3-6 on page I-337 in "lineno --- Numbering lines of text".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{207.0pt}

  \addtolength\textwidth{-30pt}
  \newcommand\sample{ Some text to experiment
    with line numbering.}
  \tolerance=3000

%StartShownPreambleCommands
\usepackage{lipsum,lineno}
\linenumbers

%StopShownPreambleCommands

\begin{document}
\lipsum[2][1-2]

\modulolinenumbers[2]
\textbf{And now a paragraph with
  numbers on every second line.}
\lipsum[2][3-5]
\end{document}