SSH免密登录

ssh免密登录

• 生成公钥、私钥

  ssh-keygen

​ 等同于ssh-keygen -t rsa

​ 运行上面命令后，系统会出现一系列提示，一路回车就可。

​ 运行结束以后，默认在~/.shh目录生成两个文件：

​ id_rsa:私钥

​ id_rsa.pub:公钥

• 导入公钥到认证文件，更改权限

  • 导入本机，导入本机以后拷贝id_rsa私钥文件到本地，就可以在xshell通过以私钥文件登录本机服务器

  cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

  • 导入到要免密登录的服务器

  1.这里推荐采用这种方法，直接导入，输入远程主机密码，这样就可以免密登录到该主机。ssh-copy-id -i ~/.ssh/id_rsa.pub remote_iproot@remote_ip's password:Now try logging into the machine, with "ssh '192.168.0.10'", and check in:.ssh/authorized_keysto make sure we haven't added extra keys that you weren't expecting.2.把生成的id_rsa.pub复制到远程主机里，并导入到authorized_keys里面scp ~/.ssh/id_rsa.pub root@remote_ip:/home/              //拷贝到远程主机的home目录导入到authorized_keys文件cat /home/id_rsa.pub >> ~/.ssh/authorized_keys 

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