1).ssh目录必须是700权限  并且属于相应用户
2)authorized_keys 文件必须是600 并且属于相应用户
vim /etc/ssh/sshd_config 注掉Allowusers
#AllowUsers username
修改后重启 service sshd restart
6)测试的时候要指私钥 防止默认私钥不对
ssh -p 22022 xiaoming@ip_address  -i /home/xiaoming/.ssh/id_rsa
7)确认 authorized_keys 不要拼错 位置在.ssh下 不是home下

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