解决Ubuntu的root账号无法登录SSH问题-Permission denied, please try again.
在root权限下
sudo gedit /etc/ssh/sshd_config
ctrl+f找到"# Authentication:"
将"# Authentication:"下面三行内容替换成:
LoginGraceTime 120
#PermitRootLogin without-password
PermitRootLogin yes
StrictModes yes