사용자 추가

# pw useradd [-n] user1 [-u uid] [-g groupname] [-G group1,...]
     -c 'comment' { -m [-k /home/user1] | -d /home/user1 }
     -s /bin/sh

사용자 삭제

# pw userdel [-n] user1 -r
  pw userdel [-u] uid -r

암호변경

# passwd user1

========================================

pw userdel help

usage: pw userdel [uid|name] [switches]
	-V etcdir      alternate /etc location
	-R rootdir     alternate root directory
	-n name        login name
	-u uid         user id
	-Y             update NIS maps
	-y path        set NIS passwd file path
	-r             remove home & contents


pw useradd help

usage: pw useradd [name] [switches]
	-V etcdir      alternate /etc location
	-R rootdir     alternate root directory
	-C config      configuration file
	-q             quiet operation
  Adding users:
	-n name        login name
	-u uid         user id
	-c comment     user name/comment
	-d directory   home directory
	-e date        account expiry date
	-p date        password expiry date
	-g grp         initial group
	-G grp1,grp2   additional groups
	-m [ -k dir ]  create and set up home
	-M mode        home directory permissions
	-s shell       name of login shell
	-o             duplicate uid ok
	-L class       user class
	-h fd          read password on fd
	-H fd          read encrypted password on fd
	-Y             update NIS maps
	-N             no update
  Setting defaults:
	-V etcdir      alternate /etc location
	-R rootdir     alternate root directory
	-D             set user defaults
	-b dir         default home root dir
	-e period      default expiry period
	-p period      default password change period
	-g group       default group
	-G grp1,grp2   additional groups
	-L class       default user class
	-k dir         default home skeleton
	-M mode        home directory permissions
	-u min,max     set min,max uids
	-i min,max     set min,max gids
	-w method      set default password method
	-s shell       default shell
	-y path        set NIS passwd file path


출처 : http://linuxchannel.net/board/read.php?table=freebsd&no=10&page