cd

cd [目录路径]

cd directory/

cd ..

cd

cd /

cd -

[[email protected] ~]# cd --helpcd: cd [-L|[-P [-e]] [[email protected]]] [dir]    Change the shell working directory.        Change the current directory to DIR.  The default DIR is the value of the    HOME shell variable.        The variable CDPATH defines the search path for the directory containing    DIR.  Alternative directory names in CDPATH are separated by a colon (:).    A null directory name is the same as the current directory.  If DIR begins    with a slash (/), then CDPATH is not used.        If the directory is not found, and the shell option `cdable_vars' is set,    the word is assumed to be  a variable name.  If that variable has a value,    its value is used for DIR.        Options:      -L        force symbolic links to be followed: resolve symbolic                links in DIR after processing instances of `..'      -P        use the physical directory structure without following                symbolic links: resolve symbolic links in DIR before                processing instances of `..'      -e        if the -P option is supplied, and the current working                directory cannot be determined successfully, exit with                a non-zero status      [email protected]        on systems that support it, present a file with extended                attributes as a directory containing the file attributes        The default is to follow symbolic links, as if `-L' were specified.    `..' is processed by removing the immediately previous pathname component    back to a slash or the beginning of DIR.        Exit Status:    Returns 0 if the directory is changed, and if $PWD is set successfully when    -P is used; non-zero otherwise.