\section cd cd - change directory

\subsection cd-synopsis Synopsis
<tt>cd [DIRECTORY]</tt>

\subsection cd-description Description
Changes the current directory. If <tt>DIRECTORY</tt> is supplied it will become
the new directory. If \c DIRECTORY is a relative path, the paths found in the
CDPATH environment variable array will be tried as prefixes for the specified
path. If CDPATH is not set, it is assumed to be '.'. If \c DIRECTORY is not
specified, \$HOME will be the new directory.