In this section, we will cover the basics of using the Redis Command Line Interface (CLI). The Redis CLI is a powerful tool that allows you to interact with your Redis server directly from the command line. This is essential for performing administrative tasks, debugging, and testing your Redis commands.

1. Connecting to Redis CLI
2. Basic Commands
3. Working with Keys
4. Using Help and Documentation
5. Practical Exercises
6. Summary

To start using the Redis CLI, you need to connect to your Redis server. Assuming you have Redis installed and running on your local machine, you can connect to the Redis CLI by simply typing:

If your Redis server is running on a different host or port, you can specify the host and port like this:

For example, to connect to a Redis server running on 192.168.1.100 at port 6379, you would use:

Once connected, you can start issuing commands. Here are some basic commands to get you started:

The PING command checks if the Redis server is running and responsive.

Expected output:

The SET command sets the value of a key, and the GET command retrieves the value of a key.

Expected output:

The DEL command deletes a key.

Expected output:

Redis keys are the fundamental building blocks for storing data. Here are some commands to manage keys:

The KEYS command lists all keys matching a given pattern.

Expected output (example):

The EXISTS command checks if a key exists.

Expected output:

The EXPIRE command sets a timeout on a key. After the timeout, the key will be automatically deleted.

Expected output:

Redis CLI provides built-in help for commands. You can use the HELP command to get information about any Redis command.

To get help on a specific command, use:

For example, to get help on the SET command:

Expected output:

1. Connect to the Redis CLI.
2. Set a key student with the value John Doe.
3. Retrieve the value of the key student.
4. Delete the key student.
5. Check if the key student exists.

Solution:

1. Set a key session with the value active.
2. Set an expiration of 5 seconds on the key session.
3. Wait for 6 seconds.
4. Check if the key session exists.

Solution:

In this section, we covered the basics of using the Redis CLI, including how to connect to the Redis server, execute basic commands, manage keys, and use the built-in help system. These foundational skills are essential for interacting with Redis and performing various administrative tasks. In the next module, we will dive deeper into Redis data structures and how to use them effectively.