我试图用root用户SSH到我的Debian 8.5。 密码是正确的，因为我可以使用本地控制台login到Debian。 PermitRootLogin在/etc/ssh/sshd_config等于yes ，并且服务器会多次重新启动以确保进行此更改。
grep PermitRootLogin /etc/ssh/sshd_config PermitRootLogin yes
我怎么解决这个问题？
运行sudo tail /var/log/auth.log ：
Nov 29 07:40:06 mydeb sshd[2530]: User root from ::1 not allowed because none of user's groups are listed in AllowGroups Nov 29 07:40:06 mydeb sshd[2530]: input_userauth_request: invalid user root [preauth] Nov 29 07:40:07 mydeb sshd[2530]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=::1 user=root Nov 29 07:40:09 mydeb sshd[2530]: Failed password for invalid user root from ::1 port 41079 ssh2 Nov 29 07:40:14 mydeb sshd[2530]: Failed password for invalid user root from ::1 port 41079 ssh2 Nov 29 07:40:16 mydeb sshd[2530]: Failed password for invalid user root from ::1 port 41079 ssh2 Nov 29 07:40:16 mydeb sshd[2530]: Connection closed by ::1 [preauth] Nov 29 07:40:16 mydeb sshd[2530]: PAM 2 more authentication failures; logname= uid=0 euid=0 tty=ssh ruser= rhost=::1 user=root
编辑/etc/ssh/sshd_config并在用AllowGroups启动的AllowGroups行添加root 。 该行应该是这样的：
AllowGroups sudo sshuser root
通过以下命令重新启动ssh服务：
service ssh restart