ULEM is a package for LaTeX or plain TeX which provides various types of underlining that can stretch between words and be broken across lines.

Unlike regular underlining, ulem allows line breaks, and even primitive hyphenation, within the underlined text; but it is far from perfect.

 In summary:
%    \uline{important}   underlined text
%    \uuline{urgent}     double-underlined text
%    \uwave{boat}        wavy underline
%    \sout{wrong}        line drawn through word
%    \xout{removed}      marked over with //////.
%    {\em phasized\/}  | In LaTeX, by default, these are underlined; use
%    \emph{asized}     | \normalem or [normalem] to restore italics
%    \useunder{\uwave}{\bfseries}{\textbf}
%                        use wavy underline in place of bold face

cp ~/dl/mustH_b/wp/latex/packages/ulem.sty $TEXMF/tex/latex/misc
texhash

$ kpsewhich ulem.sty
/usr/share/texmf/tex/latex/misc/ulem.sty