Why does “hadoop fs -mkdir” fail with Permission Denied?

Question

I am using Cloudera on a VM machine that I am playing around with. Unfortunately I am having issues copying data to the HDFS, I am getting the following:

[cl         


        

Answer 1

When you execute the above command, if hdfs home directory(/user/cloudera) is not there then that directory will be created first then the directory input will be created under /user/cloudera

For giving permission for cloudera user to create it's own directory, you got to give permission. hdfs user is the admin user in hdfs switch to hdfs then execute the following command

[hdfs@localhost~]$ hadoop fs -mkdir /user/cloudera ; hadoop fs -chmod 777  /user/cloudera

Or

if you are not too concerned about hdfs security you disable hdfs permission by setting the below property to false in hdfs-site.xml

dfs.permissions.enabled
false

after setting this property to false hdfs needs to be restarted.