2. Set Directories and Permissions

Create directories and configure ownership + permissions on the appropriate hosts as described below.

If any of these directories already exist, we recommend deleting and recreating them. Use the following instructions to create appropriate directories:

We strongly suggest that you edit and source the files included in scripts.zip file (downloaded in Download Companion Files).
Alternatively, you can also copy the contents to your ~/.bash_profile) to set up these environment variables in your environment.
Execute the following commands on all nodes:
```
mkdir -p $HBASE_LOG_DIR;
chown -R $HBASE_USER:$HADOOP_GROUP $HBASE_LOG_DIR;
chmod -R 755 $HBASE_LOG_DIR;
```
```
mkdir -p $HBASE_PID_DIR;
chown -R $HBASE_USER:$HADOOP_GROUP $HBASE_PID_DIR;
chmod -R 755 $HBASE_PID_DIR;
```
```
mkdir -p $ZOOKEEPER_LOG_DIR;
chown -R $ZOOKEEPER_USER:$HADOOP_GROUP $ZOOKEEPER_LOG_DIR;
chmod -R 755 $ZOOKEEPER_LOG_DIR;
```
```
mkdir -p $ZOOKEEPER_PID_DIR;
chown -R $ZOOKEEPER_USER:$HADOOP_GROUP $ZOOKEEPER_PID_DIR;
chmod -R 755 $ZOOKEEPER_PID_DIR;
```
```
mkdir -p $ZOOKEEPER_DATA_DIR;
chmod -R 755 $ZOOKEEPER_DATA_DIR;
chown -R $ZOOKEEPER_USER:$HADOOP_GROUP $ZOOKEEPER_DATA_DIR
```
where:
- $HBASE_LOG_DIR is the directory to store the HBase logs. For example, /var/log/hbase.
- $HBASE_PID_DIR is the directory to store the HBase process ID. For example, /var/run/hbase.
- $HBASE_USER is the user owning the HBase services. For example, hbase.
- $ZOOKEEPER_USER is the user owning the ZooKeeper services. For example, zookeeper.
- $ZOOKEEPER_LOG_DIR is the directory to store the ZooKeeper logs. For example, /var/log/zookeeper.
- $ZOOKEEPER_PID_DIR is the directory to store the ZooKeeper process ID. For example, /var/run/zookeeper.
- $ZOOKEEPER_DATA_DIR is the directory where ZooKeeper will store data. For example, /grid1/hadoop/zookeeper/data.
- $HADOOP_GROUP is a common group shared by services. For example, hadoop.

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