Hadoop Install (Make Data folder & permission)

Real data store the folder.
Make Folder ( at master and data node)
$ cd ~/
$ sudo mkdir -p data/hadoop/tmp
$ sudo mkdir -p data/hadoop/dfs/name
$ sudo mkdir -p data/hadoop/dfs/data

Make Linux groupadd
$sudo su -
#groupadd hadoop
#usermod -aG hadoop hadoop
// first hadoop is groud. second one is username

Authorization ( at master and data node)
$ sudo chown -R  hadoop:hadoop data
$ sudo chown -R  hadoop:hadoop hadoop-2.6.0