两台主机(服务器)秘钥登录流程图

咱们从A主机(右边)秘钥登录到B服务器(左边)

A主机生成公钥

生成公钥私钥，个别不须要非凡设置一路回车默认下一步即可
> ssh-keygenGenerating public/private rsa key pair.Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_rsa.Your public key has been saved in /root/.ssh/id_rsa.pub.The key fingerprint is:SHA256:+ims1qKnA9kAUbwuaGmGLdg+V4w1PMj7RO4gMHI7NCU root@JDThe key's randomart image is:+---[RSA 2048]----+|.+.              ||. E .            ||.  = o           ||= = o *          ||=%.o B oS        ||O=O + =.         ||+= o O.          ||  + = *. .       ||  oO.o .o        |+----[SHA256]-----+
查看公钥
> ls -al ~/.ssh-rw-------   1 root root  1675 May  7 21:39 id_rsa //私钥-rw-r--r--   1 root root   389 May  7 21:39 id_rsa.pub //公钥> cat id_rsa.pubssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDULg8kwT2rW8Z/r0h5lvO6KziZWV1roM/0eKVnkxeKOF9A0JAL46WF4ZA2XsNfG2camxTekC0ZwArB6uvFQTR8RZtDCwdsdsdsds6K3ytR/FOzira6z+7xbk6LvPylaCLfjfMmta04Q7dsdsdsdsdsds5MDr7oY73TWt2XToDA3FynMnl9MQjO4SoTU/Z1PiKsdOoCnbeP/O6KL+6sh9tbd5HoPPLm8LtDCeebZNhvZSulsbeTFZ5Z+HzPLostXJVhRFtiwUlaemAhXngVdIB5D9feXCYdQiP3NM0zAI94XUFCFyaSnZdv3+OTqHmxJ root@local
id_rsa.pub公钥要发送到B服务器。

B服务器增加A主机的公钥

在B服务器对应登录账号的家目录下的.ssh/authorized_keys文件增加A主机的公钥

比方咱们要应用rumenz账号进行秘钥登录,就是配置/home/rumenz/.ssh/authorized_keys

> cat /home/rumenz/.ssh/authorized_keysssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDULg8kwT2rW8Z/r0h5lvO6KziZWV1roM/0eKVnkxeKOF9A0JAL46WF4ZA2XsNfG2camxTekC0ZwArB6uvFQTR8RZtDCwdsdsdsds6K3ytR/FOzira6z+7xbk6LvPylaCLfjfMmta04Q7dsdsdsdsdsds5MDr7oY73TWt2XToDA3FynMnl9MQjO4SoTU/Z1PiKsdOoCnbeP/O6KL+6sh9tbd5HoPPLm8LtDCeebZNhvZSulsbeTFZ5Z+HzPLostXJVhRFtiwUlaemAhXngVdIB5D9feXCYdQiP3NM0zAI94XUFCFyaSnZdv3+OTqHmxJ root@local
给公钥及目录增加权限
> chmod 600 /home/rumenz//.ssh/authorized_keys> chmod 700 /home/rumenz/.ssh

sshd服务平安配置

开启秘钥登录
> vim /etc/ssh/sshd_configRSAAuthentication yesPubkeyAuthentication yes

重启sshd服务

> service sshd restart

密钥形式登录胜利后，再禁用明码登录

肯定要秘钥登录胜利后,再禁用明码登录。
> vim /etc/ssh/sshd_configPasswordAuthentication no> service sshd restart

秘钥登录测试

A主机的命令行输出
> ssh rumenz@B服务器ipLast login: Tue Mar 23 22:23:22 2021
配置正确,间接就能够登录B服务器。

原文链接:https://rumenz.com/rumenbiji/...
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