Redis is a open source in-memory data structure store, handle as a distributed, in-memory key–value database, cache and message broker, with optional durability. 
To start and stop the Redis server on Ubuntu 22.04, you can follow these steps:

Start Redis Server:

Open a terminal window.
Run the following command to start the Redis server:

sudo systemctl start redis-server

Enter your password if prompted.

Stop Redis Server:

Open a terminal window.
Run the following command to stop the Redis server:
sudo systemctl stop redis-server

Enter your password if prompted.

If you haven't installed Redis as a service, you can install it by following these steps:

Update the package manager:
sudo apt update

Install Redis:
sudo apt install redis-server

After installing Redis, it should start automatically as a service.