安装hadoop时ssh失败：连接到主机主端口22：连接被拒绝

Question

我想安装hadoop集群，我的电脑的主机名是修改后的Master。我配置ssh登录没有密码，但我只能成功使用ssh localhost，当涉及ssh Master时，它显示ssh：connect to host master port 22：connection refused。我不知道为什么

/etc/host
127.0.0.1 localhost
113.*.*.2 Master
113.*.*.31 Slave1

cd ~/.ssh
rm ./id_rsa
ssh-keygen -t rsa
cat ./id_rsa.pub >> ./authorized_keys
ssh Master

Answer 1

这样做：

ssh-keygen -t rsa
ssh-copy-id -i ~/.ssh/id_rsa.pub root@master
ssh-copy-id -i ~/.ssh/id_rsa.pub root@slave1
chmod 0600 ~/.ssh/authorized_keys