FreeNX ssh sshd_conf public key
http://d.hatena.ne.jp/mobitan/20090130/1233403256
$ sudo nano /etc/ssh/sshd_config
AllowUsers nx "nx allowed username"
$ sudo nano /etc/nxserver/node.conf
ENABLE_PASSDB_AUTHENTICATION="1"
$ sudo nxserver --adduser "nx allowed username"
$ sudo nxserver --passwd "nx allowed username"