mathiaz@hardy-server-amd64:~$ sudo domainjoin-cli --log /tmp/domainjoin.log --loglevel verbose join canonical.local Administrator
Password: 
Joining AD domain:   canonical.local...
An invalid hostname was specified
mathiaz@hardy-server-amd64:~$ cat /tmp/domainjoin.log 
20080211145657:INFO:Joining AD domain: canonical.local
20080211145657:INFO:Join Admin Userid: Administrator
20080211145657:INFO:Getting computer name...
20080211145657:INFO:Checking validity of computer name [hardy-server-amd64].
20080211145657:INFO:Checking status of daemon [/etc/init.d/likewise-open]
20080211145657:INFO:Daemon [/etc/init.d/likewise-open]: status [0]
20080211145657:INFO:Checking status of daemon [/etc/init.d/likewise-open]
20080211145657:INFO:Daemon [/etc/init.d/likewise-open]: status [0]