To interact with specific Redis databases within a Docker environment, follow these steps to connect directly using containerized tools.

Begin by launching a Redis instance in a detached container:

docker run -d --name redis-instance redis

Once the container is runing, access its shell using the exec comand:

docker exec -it redis-instance sh

Within the container shell, use the redis-cli utility with the -n flag to select a database. Redis supports 16 databases (indexed from 0 to 15). To switch to database number 3, for example:

redis-cli -n 3

This command connects to the specified database, enabling operations such as setting or retrieving keys in that context.

For verification, you can check the current database index using:

redis-cli INFO | grep "db0"

This workflow allows seamless navigation between Redis databases without modifying configuration files or restarting services.