Redis Server Database Cheatsheet

Redis is an open-source, in-memory data structure store that can be used as a database, cache, and message broker. It is known for its speed and flexibility, making it a popular choice for various applications. This cheatsheet serves as a quick reference guide for managing a Redis server database, covering essential commands and concepts.

Installation and Connection

Installation

# Ubuntu
sudo apt-get update
sudo apt-get install redis-server

# macOS
brew install redis

Connection

redis-cli

Basic Commands

Setting and Retrieving Values

# Set a key-value pair
SET key_name "value"

# Get the value of a key
GET key_name

Expiring Keys

# Set a key with an expiration time (in seconds)
SET key_name "value" EX 3600

# Get the remaining time to live for a key
TTL key_name

Data Types

Strings

# Set a string value
SET string_key "Hello, Redis!"

# Get a string value
GET string_key

Lists

# Push elements to the beginning of a list
LPUSH list_name "element1" "element2"

# Get elements from a list
LRANGE list_name 0 -1

Sets

# Add members to a set
SADD set_name "member1" "member2"

# Get members of a set
SMEMBERS set_name

Hashes

# Set fields in a hash
HSET hash_name field1 "value1" field2 "value2"

# Get all fields and values in a hash
HGETALL hash_name

Sorted Sets

# Add members to a sorted set with scores
ZADD sorted_set_name 1 "member1" 2 "member2"

# Get members of a sorted set by score range
ZRANGEBYSCORE sorted_set_name 1 2

Advanced Commands

Pub/Sub (Publish/Subscribe)

# Subscribe to a channel
SUBSCRIBE channel_name

# Publish a message to a channel
PUBLISH channel_name "message"

Transactions

# Begin a transaction
MULTI

# Add commands to the transaction
SET key1 "value1"
SET key2 "value2"

# Execute the transaction
EXEC

Scripting with Lua

# Run a Lua script
EVAL "return redis.call('GET', 'key')" 0

This Redis cheatsheet covers some of the fundamental commands and concepts for managing a Redis server database. Redis is a powerful tool with a rich set of features, and mastering these basics will provide a solid foundation for working with this versatile in-memory data store. Keep this cheatsheet handy for quick reference as you explore and utilize Redis in your applications.

FAQ