Common Redis Commands Cheat Sheet

18. Common Redis Commands Cheat Sheet

Command Types Overview

flowchart TB
    CMDS[Redis Commands] --> Strings["🔤 Strings<br/>SET / GET / INCR / MSET<br/>Values, counters, tokens"]
    CMDS --> Lists["📋 Lists<br/>LPUSH / RPUSH / LPOP / LRANGE<br/>Queues, timelines"]
    CMDS --> Sets["🔢 Sets<br/>SADD / SINTER / SUNION / SDIFF<br/>Unique members, tags"]
    CMDS --> SortedSets["🏆 Sorted Sets<br/>ZADD / ZRANGE / ZREVRANK<br/>Leaderboards, rankings"]
    CMDS --> Hashes["🗂️ Hashes<br/>HSET / HGET / HGETALL / HINCRBY<br/>Objects, profiles"]
    CMDS --> Keys["🔑 Keys & TTL<br/>EXPIRE / TTL / SCAN / TYPE<br/>Management"]
    CMDS --> Server["⚙️ Server<br/>INFO / PING / CONFIG / MONITOR<br/>Administration"]

    style CMDS fill:#7c3aed,color:#fff
    style Strings fill:#3b82f6,color:#fff
    style Lists fill:#059669,color:#fff
    style Sets fill:#f59e0b,color:#fff
    style SortedSets fill:#ec4899,color:#fff
    style Hashes fill:#06b6d4,color:#fff
    style Keys fill:#8b5cf6,color:#fff
    style Server fill:#10b981,color:#fff

Quick reference: 7 command categories covering all essential Redis operations. Each section below has the full syntax.

String Commands

Command	Syntax	Description
`SET`	`SET key value [EX seconds]`	Set a key
`GET`	`GET key`	Get a value
`MSET`	`MSET k1 v1 k2 v2`	Set multiple keys
`MGET`	`MGET k1 k2`	Get multiple values
`DEL`	`DEL key`	Delete a key
`EXISTS`	`EXISTS key`	Check if key exists (1/0)
`APPEND`	`APPEND key value`	Append to string
`INCR`	`INCR key`	Increment by 1
`INCRBY`	`INCRBY key amount`	Increment by N
`DECR`	`DECR key`	Decrement by 1

List Commands

Command	Syntax	Description
`LPUSH`	`LPUSH key val [val ...]`	Push to left
`RPUSH`	`RPUSH key val [val ...]`	Push to right
`LPOP`	`LPOP key`	Pop from left
`RPOP`	`RPOP key`	Pop from right
`LRANGE`	`LRANGE key 0 -1`	Get all elements
`LLEN`	`LLEN key`	Get list length
`LINDEX`	`LINDEX key index`	Get element at index
`LTRIM`	`LTRIM key start stop`	Keep only a range
`BLPOP`	`BLPOP key timeout`	Blocking pop from left

Set Commands

Command	Syntax	Description
`SADD`	`SADD key member [...]`	Add members
`SREM`	`SREM key member`	Remove a member
`SMEMBERS`	`SMEMBERS key`	Get all members
`SISMEMBER`	`SISMEMBER key member`	Check membership
`SCARD`	`SCARD key`	Count members
`SINTER`	`SINTER key1 key2`	Intersection
`SUNION`	`SUNION key1 key2`	Union
`SDIFF`	`SDIFF key1 key2`	Difference

Sorted Set Commands

Command	Syntax	Description
`ZADD`	`ZADD key score member`	Add with score
`ZRANGE`	`ZRANGE key 0 -1 WITHSCORES`	Get ascending
`ZREVRANGE`	`ZREVRANGE key 0 -1`	Get descending
`ZRANK`	`ZRANK key member`	Get rank (ascending)
`ZREVRANK`	`ZREVRANK key member`	Get rank (descending)
`ZSCORE`	`ZSCORE key member`	Get member’s score
`ZREM`	`ZREM key member`	Remove a member
`ZCOUNT`	`ZCOUNT key min max`	Count in score range

Hash Commands

Command	Syntax	Description
`HSET`	`HSET key field value`	Set field
`HGET`	`HGET key field`	Get field
`HGETALL`	`HGETALL key`	Get all fields & values
`HMGET`	`HMGET key f1 f2`	Get multiple fields
`HDEL`	`HDEL key field`	Delete a field
`HEXISTS`	`HEXISTS key field`	Check if field exists
`HKEYS`	`HKEYS key`	Get all field names
`HVALS`	`HVALS key`	Get all values
`HINCRBY`	`HINCRBY key field N`	Increment field by N

Key & TTL Commands

Command	Syntax	Description
`EXPIRE`	`EXPIRE key seconds`	Set TTL in seconds
`TTL`	`TTL key`	Get remaining TTL
`PTTL`	`PTTL key`	Get TTL in milliseconds
`PERSIST`	`PERSIST key`	Remove TTL
`KEYS`	`KEYS pattern`	Find matching keys (⚠️ avoid in prod)
`SCAN`	`SCAN cursor MATCH pattern COUNT N`	Safely iterate keys
`TYPE`	`TYPE key`	Get data type of key
`RENAME`	`RENAME key newkey`	Rename a key
`RANDOMKEY`	`RANDOMKEY`	Get a random key

Server Commands

Command	Syntax	Description
`PING`	`PING`	Test connection
`INFO`	`INFO`	Server statistics
`DBSIZE`	`DBSIZE`	Number of keys
`FLUSHDB`	`FLUSHDB`	Delete all keys in current DB
`FLUSHALL`	`FLUSHALL`	Delete all keys in all DBs
`SAVE`	`SAVE`	Synchronous snapshot
`BGSAVE`	`BGSAVE`	Asynchronous snapshot
`CONFIG GET`	`CONFIG GET maxmemory`	Get config value
`CONFIG SET`	`CONFIG SET maxmemory 256mb`	Set config value
`MONITOR`	`MONITOR`	Real-time command log