使用云主机配置互信后ssh: connect to host hadoop port 22: Connection timed out

使用云主机配置互信后，使用命令ssh hadoop date
提示 ssh: connect to host hadoop port 22: Connection timed out
关闭防火墙，并在防火墙配置入站规则
ssh: Could not resolve hostname hadoop0: Name or service not known错误
将hadoop对应的ip地址加到文件名/etc/hosts中。
如：116.207.129.111 hadoop

【来自@若泽大数据】