Hi@akhtar,
Before you start the Zookeeper service, you need to install Java in your system. To start the zookeeper service, you can run the below command.
$ bin/zkServer.sh start
/usr/bin/java
ZooKeeper JMX enabled by default
Using config: /root/edureka/apache-zookeeper-3.6.2-bin/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED