question about openssh authentication.

[joshua]

dear firends:

    there is a puzzle about openssh authentication, i try to solve it,
but i could not, could you help me?
    there is two account named as 'joshua' and 'moon' on my server. i
want to disable password authentication method for 'joshua', let he can
login only use public key authentication. but account 'moon' can use
both public key and password authentication. here, how to config
openssh?

thankfulness.

joshua Yu



=====
Joshua Yu
MSN: joshuayuAThotmail.com
YAHOO MESSENGER: cigant

_________________________________________________________
Do You Yahoo!?
150ÍòÇúMP3·è¿ñËÑ£¬´øÄú´³ÈëÒôÀÖµîÌÃ
http://music.yisou.com/
ÃÀÅ®Ã÷ÐÇÓ¦Óо¡ÓУ¬ËѱéÃÀͼ¡¢ÑÞͼºÍ¿áͼ
http://image.yisou.com
1G¾ÍÊÇ1000Õ×£¬ÑÅ»¢µçÓÊ×ÔÖúÀ©ÈÝ£¡
http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/event/mail_1g/