linux 之秘钥登录

> 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]-----+

> 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

> cat /home/rumenz/.ssh/authorized_keysssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDULg8kwT2rW8Z/r0h5lvO6KziZWV1roM/0eKVnkxeKOF9A0JAL46WF4ZA2XsNfG2camxTekC0ZwArB6uvFQTR8RZtDCwdsdsdsds6K3ytR/FOzira6z+7xbk6LvPylaCLfjfMmta04Q7dsdsdsdsdsds5MDr7oY73TWt2XToDA3FynMnl9MQjO4SoTU/Z1PiKsdOoCnbeP/O6KL+6sh9tbd5HoPPLm8LtDCeebZNhvZSulsbeTFZ5Z+HzPLostXJVhRFtiwUlaemAhXngVdIB5D9feXCYdQiP3NM0zAI94XUFCFyaSnZdv3+OTqHmxJ root@local

> chmod 600 /home/rumenz//.ssh/authorized_keys> chmod 700 /home/rumenz/.ssh

> vim /etc/ssh/sshd_configRSAAuthentication yesPubkeyAuthentication yes

> service sshd restart

> vim /etc/ssh/sshd_configPasswordAuthentication no
> service sshd restart

> ssh rumenz@B服务器ipLast login: Tue Mar 23 22:23:22 2021