http://fedoraforum.org/forum/showthread.php?t=257689

How to find the count of different values in a column of a dataframe in R

You can use the table command

table(data_frame$column_name)

Rstudio shows error ** package ‘RCurl’ successfully unpacked and MD5 sums checked checking for curl-config... no Cannot find curl-config ERROR: configuration failed for package ‘RCurl’

This is because your system does not have the curl package
To install

sudo yum install curl
sudo yum install libcurl libcurl-devel

Changing ownership in hdfs

To change the owner ie chown you need to run it as hdfs user
It changed the owner to myuser when i copied it from another location but this command saved the day.

sudo -u hdfs hadoop fs -chown -R hbase:hbase /hbase/Table_Name