Get ZooKeeper source:

cd /opt
git clone https://github.com/apache/zookeeper
cd /opt/zookeeper
ant

Build ZooKeeper Inspector:

cd /opt/zookeeper/src/contrib/zooinspector/
ant

Run ZooKeeper Inspector:

cd /opt/zookeeper/build/contrib/ZooInspector
chmod 755 zooInspector.sh
cp /opt/zookeeper/build/zookeeper-*.jar /opt/zookeeper/build/contrib/ZooInspector/lib
./zooInspector.sh