useradd [ -c comment ] [ -d dir ] [ -e expire ]
     [ -f inactive ] [ -g group ] [ -G group [, group...]]
     [ -m [ -k skel_dir ]]
     [ -u uid [ -o]] [ -s shell ] login

OPTIONS

-c comment  Any  text  string.   It  is  generally  a  short
            description  of the login, and is currently used
            as the field for the  user's  full  name.   This
            information  is stored in the user's /etc/passwd
            entry.

-m     The user's home directory will  be  created  if  it
       does  not  exist.

-d dir      The home directory of the new user.  It defaults
            to  base_dir/login,  where  base_dir is the base
            directory for new  login  home  directories  and
            login is the new login name.