Binbin, Password authentication is disabled for our AMIs. If you want to enable it you need to modify /etc/ssh/sshd_config file and set: PasswordAuthentication yes PermitRootLogin yes We strongly do not recommend it as it is a quite big security risk. Use it at your own responsibility. --Marek On 25 paź 2011, at 02:58, Binbin Wang wrote: > Thanks Marek, while I changed the passwd of the root user, I still need the key to ssh login the system? > > Are there any configuration I need to change? Then I can log in the system only with my root credential, instead of the key pair? _______________________________________________ cloud mailing list cloud@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/cloud