问题
I'm using Cloudera-quickstart 5.5.0 virtualbox
Trying to run this on terminal. As you can below, there is an exception. I've searched for solution to solve this on internet and found something.
1-) configuring core-site.xml file. https://datashine.wordpress.com/2014/09/06/java-net-connectexception-connection-refused-for-more-details-see-httpwiki-apache-orghadoopconnectionrefused/
But I can only open this file readable and haven't been able to change it. It seems I need to be root or hdfs user (su hdfs -) but it asks me for a password which I don't know.
回答1:
A network configuration is not your problem. You don't need to touch any configurations in the VM, you need to start the services. In this image, for example. The HDFS service on the left is disabled, and I get the same error on that last command.
You have to start Cloudera Manager and start ZooKeeper, YARN, and HDFS (in that order).
To open Cloudera Manager, go to http://quickstart.cloudera:7180 in Firefox on the VM.
Then start the mentioned services.
After you start the services, you can use HDFS commands.
来源：https://stackoverflow.com/questions/36142079/connection-refused-to-quickstart-cloudera8020