1、问题描述
搭建rocketmq集群时，使用ssh-copy-id命令拷贝密钥到其他机器，如hadoop01,hadoop02，出现如下错误信息
[root@hadoop03 .ssh]# ssh-copy-id hadoop02
/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: ERROR: ssh: Could not resolve hostname hadoop02: Name or service not known
[root@hadoop03 .ssh]# ssh-copy-id hadoop01
/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: ERROR: ssh: Could not resolve hostname hadoop01: Name or service not known
如图：
2、切换root账户执行
su root命令
3、编辑/etc/hosts文件，执行如下命令
vi /etc/hosts
在文件末尾添加以下配置
wq!保存并退出
4、再次执行命令
ssh-copy-id hadoop02
输出信息如下
错误解决
