Permission denied (publickey,gssapi-with-mic).

$ ssh root@192.168.xx.xx

Permission denied (publickey,gssapi-with-mic).

报了这么个错，原因是我上次做测试时修改了/etc/ssh/sshd_config 中的"PasswordAuthentication"参数值为"no",修改回"yes"，重启sshd服务即可。