ssh-copy-id命令 – 复制SSH公钥到远程主机

ssh-copy-id命令来自英文词组ssh copy id，其功能是将本地生成的SSH公钥信息复制到远程主机。通常情况下，运维人员会先使用ssh-keygen命令生成SSH密钥对（公钥/私钥）文件，随后使用ssh-copy-id命令将公钥文件复制到远程主机上，这样操作后，再进行远程SSH访问时将无须进行账号密码验证，而是通过密钥方式登录。

语法格式：ssh-copy-id 参数 域名或IP地址

常用参数：

-f强制复制而不询问 -n仅测试，而不实际操作
-i设置公钥文件路径-p设置使用的端口号

参考示例

将SSH公钥文件复制到远程主机：

[root@linuxcool ~]# ssh-copy-id 192.168.10.10 
The authenticity of host '192.168.10.10 (192.168.10.10)' can't be established. 
ECDSA key fingerprint is SHA256:212/FhZ+6JFs5psuMJx9+5alyW6QDzviE0miulDPiKk. 
Are you sure you want to continue connecting (yes/no)? yes 
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed 
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys 
root@192.168.10.10's password: 此处输入远程主机管理员密码

Number of key(s) added: 1 

Now try logging into the machine, with: "ssh '192.168.10.10'" 
and check to make sure that only the key(s) you wanted were added.
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