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Redis Setup and Connecting

Run Redis locally, in Docker, or use a managed service, then connect with redis-cli — the interactive command-line client.

Getting Redis running

bash

docker run -d -p 6379:6379 redis     # run in Docker (default port 6379)

redis-cli                            # connect
127.0.0.1:6379> PING
PONG

PING → PONG confirms the connection. Redis listens on port 6379 by default.

Basic CLI usage

redis-cli

redis-cli SET greeting "hello"    # run a command directly
redis-cli GET greeting            # "hello"

# inside the interactive shell:
127.0.0.1:6379> SELECT 1          # switch to database 1 (0-15 available)
127.0.0.1:6379> DBSIZE            # number of keys
127.0.0.1:6379> FLUSHDB           # clear the current database (careful!)

Connection string

Apps connect with a URL: redis://:password@host:6379/0 (or rediss:// for TLS). It carries host, port, password, and database number.

Managed Redis

Note: In production, managed options — Redis Cloud, AWS ElastiCache, Azure Cache for Redis — handle persistence, failover, and scaling for you, so you rarely run Redis by hand.

Tip: RedisInsight is a free official GUI for browsing keys, running commands, and visualizing memory usage — handy while you're learning the data types.

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