lfs-book-zh_CN/appendixa/less-desc.xml

<sect2><title>Short descriptions</title>

<para><command>less</command> is a file viewer or pager. It displays the
contents of the given file, letting you scroll around, find strings, and jump
to marks.</para>

<para><command>lessecho</command> is needed to expand metacharacters,
such as * and ?, in filenames on Unix systems.</para>

<para><command>lesskey</command> is used to specify the key bindings
for less.</para>

</sect2>