Azure Event Hubs is a cloud-based messaging service that enables the reliable and secure transmission of data streams at high scale, allowing you to process and analyze real-time data from a variety of sources, such as devices, sensors, applications, and services.

To get started with Azure Event Hubs, follow these steps:

Step 1: Create an Azure Event Hubs Namespace

To create an Azure Event Hubs namespace, follow these steps:

1. Log in to the Azure portal (https://portal.azure.com).
2. Click on “Create a resource” in the upper-left corner of the Azure portal.
3. Type “Event Hubs” in the search bar and select “Event Hubs” from the search results.
4. Click on “Create” to start the creation process.
5. In the “Basics” tab, select your subscription, resource group, and region.
6. Enter a name for your Event Hubs namespace.
7. Click on “Create” to create the namespace.

Step 2: Create an Event Hub

To create an Event Hub within the namespace, follow these steps:

1. Open the Azure CLI (command-line interface) in your terminal or command prompt.
2. Log in to your Azure account by running the following command: az login
3. Set your subscription by running the following command:

az account set --subscription <subscription_name>

Replace <subscription_name> with the name of your subscription.

4. Create an Event Hub by running the following command:

az eventhubs eventhub create --resource-group <resource_group_name> --namespace-name <namespace_name> --name <eventhub_name>

Replace <resource_group_name> with the name of your resource group, <namespace_name> with the name of your Event Hubs namespace, and <eventhub_name> with the name you want to give your Event Hub.

Step 3: Create a Shared Access Policy

To allow clients to send or receive data to/from an Event Hub, you need to create a Shared Access Policy. Follow these steps:

1. Open the Azure portal.
2. Go to your Event Hubs namespace.
3. Click on “Shared access policies” in the left-hand menu.
4. Click on “Add” to create a new Shared Access Policy.
5. Enter a name for the policy, such as “send-receive-policy”.
6. Select the “Send” and “Listen” permissions.
7. Click on “Create” to create the policy.

Step 4: Retrieve the Connection String

To connect to the Event Hub, you need to retrieve the connection string. Follow these steps:

1. Open the Azure portal.
2. Go to your Event Hubs namespace.
3. Click on “Shared access policies” in the left-hand menu.
4. Click on the Shared Access Policy you created in Step 3.
5. Copy the “Connection string-primary key” value.

Step 5: Send and Receive Data

To send and receive data to/from your Event Hub, you can use a client library, such as the Event Hubs client library for .NET, Java, Python, or Node.js.

Alternatively, you can use the Azure CLI to send and receive data. Follow these steps:

1. Open the Azure CLI.
2. To send data to the Event Hub, run the following command:

az eventhubs eventhub send --resource-group <resource_group_name> --namespace-name <namespace_name> --name <eventhub_name> --partition-key <partition_key> --message "Hello, World!"

Replace <resource_group_name>, <namespace_name>, <eventhub_name>, and <partition_key> with the appropriate values. The –message parameter specifies the message you want to send.

3. To receive data from the Event Hub, run the following command:

az eventhubs eventhub receive --resource-group <resource_group_name> --namespace-name <namespace_name> --name <eventhub_name> --consumer-group $Default

Replace <resource_group_name>, <namespace_name>, and <eventhub_name> with the appropriate values. The –consumer-group parameter specifies the consumer group you want to receive messages from. In this case, we’re using the default consumer group, $Default.

That’s it! You’ve now created an Azure Event Hubs namespace, an Event Hub, and a Shared Access Policy, and you’ve sent and received data to/from the Event Hub using the Azure CLI.

Note that there are many more features and capabilities of Azure Event Hubs, such as batching, checkpointing, scaling, and monitoring, which you can explore in the Azure portal or through the Azure CLI or SDKs.

Here are a few more CLI commands that you can use to interact with Azure Event Hubs:

1. List all Event Hubs in a namespace:

az eventhubs eventhub list --resource-group <resource_group_name> --namespace-name <namespace_name>

Replace <resource_group_name> and <namespace_name> with the appropriate values.

2. List all consumer groups in an Event Hub:

az eventhubs eventhub consumer-group list --resource-group <resource_group_name> --namespace-name <namespace_name> --eventhub-name <eventhub_name>

Replace <resource_group_name>, <namespace_name>, and <eventhub_name> with the appropriate values.

3. Create a new consumer group in an Event Hub:

az eventhubs eventhub consumer-group create --resource-group <resource_group_name> --namespace-name <namespace_name> --eventhub-name <eventhub_name> --name <consumer_group_name>

Replace <resource_group_name>, <namespace_name>, <eventhub_name>, and <consumer_group_name> with the appropriate values.

4. Delete a consumer group in an Event Hub:

az eventhubs eventhub consumer-group delete --resource-group <resource_group_name> --namespace-name <namespace_name> --eventhub-name <eventhub_name> --name <consumer_group_name>

Replace <resource_group_name>, <namespace_name>, <eventhub_name>, and <consumer_group_name> with the appropriate values.

5. Get the partition count of an Event Hub:

az eventhubs eventhub show --resource-group <resource_group_name> --namespace-name <namespace_name> --name <eventhub_name> --query partitionCount

Replace <resource_group_name>, <namespace_name>, and <eventhub_name> with the appropriate values.

These CLI commands should give you a good starting point for working with Azure Event Hubs. However, keep in mind that there are many more commands and options available, so be sure to check out the Azure CLI documentation for Event Hubs for more information.