h1. Terminating a Cluster

When you are done using your cluster, you can terminate all instances in it.

*WARNING: All data will be deleted when you terminate the cluster, unless you are using EBS.*

*To terminate a cluster:*
{code}
% hadoop-ec2 terminate-cluster my-hadoop-cluster
{code}

*To delete the EC2 security groups:*
{code}
% hadoop-ec2 delete-cluster my-hadoop-cluster
{code}