Redis Cheatsheet

Install Redis cli

$ brew install redis-cli

General

PING               # Test connection, returns PONG
AUTH <password>    # Authenticate with password
SELECT <db>        # Switch to a specific database (default is 0)
DBSIZE             # Get total number of keys in the current DB
FLUSHDB            # Remove all keys from the current DB
FLUSHALL           # Remove all keys from all DBs
KEYS <pattern>     # Find keys matching a pattern (use with caution in production)
SCAN 0 MATCH <p>   # Incrementally iterate keys (safer than KEYS)
TYPE <key>         # Get data type of a key
TTL <key>          # Get remaining time to live of a key
EXPIRE <key> <s>   # Set a key’s expiration in seconds
PERSIST <key>      # Remove the expiration from a key

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Strings

SET <key> <val>            # Set value
GET <key>                  # Get value
MSET k1 v1 k2 v2           # Set multiple keys
MGET k1 k2                 # Get multiple keys
INCR <key>                 # Increment integer value
DECR <key>                 # Decrement integer value
APPEND <key> <val>         # Append value to existing key
STRLEN <key>               # Get length of value

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Hashes

HSET <key> <field> <val>   # Set field in a hash
HGET <key> <field>         # Get field value
HMSET <key> f1 v1 f2 v2    # Set multiple fields
HMGET <key> f1 f2          # Get multiple fields
HGETALL <key>              # Get all fields and values
HDEL <key> <field>         # Delete a field
HLEN <key>                 # Number of fields
HKEYS <key>                # Get all field names
HVALS <key>                # Get all values
HEXISTS <key> <field>      # Check if field exists

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Lists

LPUSH <key> <val>          # Push value to head
RPUSH <key> <val>          # Push value to tail
LPOP <key>                 # Remove and return first element
RPOP <key>                 # Remove and return last element
LRANGE <key> 0 -1          # Get all elements
LLEN <key>                 # Get list length
LINDEX <key> <i>           # Get element at index
LREM <key> <count> <val>   # Remove elements equal to value
LTRIM <key> <start> <end>  # Keep a sublist

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Sets

SADD <key> <val>           # Add member
SREM <key> <val>           # Remove member
SMEMBERS <key>             # Get all members
SISMEMBER <key> <val>      # Check if member exists
SCARD <key>                # Get number of members
SINTER key1 key2           # Intersection
SUNION key1 key2           # Union
SDIFF key1 key2            # Difference

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Sorted Sets

ZADD <key> <score> <val>   # Add member with score
ZRANGE <key> 0 -1          # Get all members by score (lowest to highest)
ZREVRANGE <key> 0 -1       # Get all members (highest to lowest)
ZRANK <key> <val>          # Get rank of member
ZREVRANK <key> <val>       # Get reverse rank
ZSCORE <key> <val>         # Get score of member
ZCARD <key>                # Number of members
ZREM <key> <val>           # Remove member

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Transactions

MULTI          # Start transaction
EXEC           # Execute transaction
DISCARD        # Cancel transaction
WATCH <key>    # Watch key for changes
UNWATCH        # Stop watching keys

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Pub/Sub

PUBLISH <chan> <msg>       # Publish message
SUBSCRIBE <chan>           # Subscribe to channel
PSUBSCRIBE <pattern>       # Subscribe to channel pattern
UNSUBSCRIBE <chan>         # Unsubscribe

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Persistence and Config

SAVE                       # Save DB synchronously
BGSAVE                     # Save DB asynchronously
CONFIG GET <param>         # Read config
CONFIG SET <param> <val>   # Update config
INFO                       # Get server info
MONITOR                    # Stream all commands (debugging)

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Advanced Topics

• Replication: SLAVEOF host port (deprecated, use REPLICAOF)

• Cluster: CLUSTER NODES, CLUSTER INFO

• Security: Use ACL LIST, ACL SETUSER

• Performance: Prefer SCAN over KEYS in production