搞个SSH密钥登陆

生成密钥对

ssh-keygen -t rsa -b 4096 -C "xxxx@gmail.com" -f /root/.ssh/sshkey -N ""

存放公钥文件到对应位置并授权

cat ~/.ssh/sshkey.pub >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys

查看私钥信息复制到本地（SSH客户端所在的设备上）

cat ~/.ssh/sshkey

修改服务器端SSH只接收密钥登录的参数

etc/ssh/sshd_config

PermitRootLogin prohibit-password

PasswordAuthentication no

PubkeyAuthentication yes

ChallengeResponseAuthentication no

rm -rf /etc/ssh/sshd_config.d/* /etc/ssh/ssh_config.d/*

重启服务器生效

reboot