The following options apply to the useradd and usermod commands:
-c comment    This field sets the contents of the passwd GECOS field,
                   which normally contains up to four comma-separated fields
                   containing the user's full name, office or location, and
                   work and home phone numbers.  These sub-fields are used by
                   convention only, however, and are optional.  If this field
                   is to contain spaces, you need to quote the comment itself
                   with double quotes `"'.  Avoid using commas in this field
                   as these are used as sub-field separators, and the colon
                   `:' character also cannot be used as this is the field sep-
                   arator for the passwd file itself.
-n name       Specify the user/account name.
-e date       Set the account's expiration date.  Format of the date is
                   either a UNIX time in decimal, or a date in `dd-mmm-yy[yy]'
                   format, where dd is the day, mmm is the month, either in
                   numeric or alphabetic format ('Jan', 'Feb', etc) and year
                   is either a two or four digit year.  This option also
                   accepts a relative date in the form `+n[mhdwoy]' where `n'
                   is a decimal, octal (leading 0) or hexadecimal (leading 0x)
                   digit followed by the number of Minutes, Hours, Days,
                   Weeks, Months or Years from the current date at which the
                   expiration date is to be set.
-m            This option instructs pw to attempt to create the user's
                   home directory.  While primarily useful when adding a new
                   account with useradd, this may also be of use when moving
                   an existing user's home directory elsewhere on the file
                   system.  The new home directory is populated with the con-
                   tents of the skeleton directory, which typically contains a
                   set of shell configuration files that the user may person-
                   alize to taste.  Files in this directory are usually named
                   dot.<config> where the dot prefix will be stripped.  When
                   -m is used on an account with usermod, existing configura-
                   tion files in the user's home directory are not overwritten
                   from the skeleton files.
-s shell      Set or changes the user's login shell to shell.  If the
                   path to the shell program is omitted, pw searches the
                   shellpath specified in /etc/pw.conf and fills it in as
                   appropriate.  Note that unless you have a specific reason
                   to do so, you should avoid specifying the path - this will
                   allow pw to validate that the program exists and is exe-
                   cutable.  Specifying a full path (or supplying a blank ""
                   shell) avoids this check and allows for such entries as
                   /nonexistent that should be set for accounts not intended
                   for interactive login.
-h fd         This option provides a special interface by which interac-
                   tive scripts can set an account password using pw.  Because
                   the command line and environment are fundamentally insecure
                   mechanisms by which programs can accept information, pw
                   will only allow setting of account and group passwords via
                   a file descriptor (usually a pipe between an interactive
                   script and the program).  sh, bash, ksh and perl all pos-
                   sess mechanisms by which this can be done.  Alternatively,
                   pw will prompt for the user's password if -h 0 is given,
                   nominating stdin as the file descriptor on which to read
                   the password.  Note that this password will be read only
                   once and is intended for use by a script rather than for
                   interactive use.  If you wish to have new password confir-
                   mation along the lines of passwd(1), this must be imple-
                   mented as part of an interactive script that calls pw.
-L class      This option sets the default login class for new users.