免密登录设置：
- 进入到我的home目录 cd ~/.ssh
- 生成ssh免登陆秘钥ssh-keygen -t rsa （四个回车）执行完这个命令后，会生成两个文件id_rsa（私钥）、id_rsa.pub（公钥）
- 将公钥拷贝到要免登陆的机器上
- 将公钥添加到要免登陆机器的.ssh文件夹下的authorized_keys中,确保该文件权限为600. cat id_rsa.pub >> authorized_keys
//SSH client
[root@localhost ~]# cd .ssh
[root@localhost .ssh]# ls
authorized_keys known_hosts
[root@localhost .ssh]# ssh-keygen -t rsa <<< 默认是2024 -d 可以修改 -C 加注释
[root@localhost .ssh]# ls
authorized_keys id_rsa id_rsa.pub known_hosts
[root@localhost .ssh]# scp id_rsa.pub root@10.124.45.85:/root
root@10.124.45.85's password:
id_rsa.pub 100% 408 134.2KB/s 00:00
//SSH server
[root@localhost ~]# cat id_rsa.pub >> .ssh/authorized_keys
[root@localhost ~]#
-
HI Xu
For Line 8:
you can use command:
[root@localhost .ssh]#ssh-copy-id root@10.124.45.85
then, you can login the 10.124.45.85 bypass password.
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