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🔴 Redis Cheat Codes

Redis Cheat Codes

Redis Cheat Codes for string caching, hashes, lists, pub/sub, Lua scripts, and memory management. 20 essential cheat codes ready to copy and execute.

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# 1 SET / GET Strings

Store and retrieve key-value string pairs.

Syntax:

SET key "value" / GET key

Working Example:

SET user:42 "Alex" / GET user:42

# 2 SET EX (TTL Expiration) Strings

Set key-value pair with TTL expiration seconds.

Syntax:

SET key "value" EX seconds

Working Example:

SET cache:session "token_123" EX 3600

# 3 HSET / HGETALL Hashes

Store and fetch structured hash fields.

Syntax:

HSET key field "val" / HGETALL key

Working Example:

HSET user:101 name "Alex" email "a@b.com" / HGETALL user:101

# 4 LPUSH / RPOP Lists

Push element to list head and pop from tail (queue).

Syntax:

LPUSH key "val" / RPOP key

Working Example:

LPUSH jobs "job_99" / RPOP jobs

# 5 SADD / SMEMBERS Sets

Add unique members to set and fetch all members.

Syntax:

SADD key "member" / SMEMBERS key

Working Example:

SADD tags:post:10 "sql" "nosql" / SMEMBERS tags:post:10

# 6 ZADD / ZREVRANGE Sorted Sets

Add member with score and fetch top leaderboard ranks.

Syntax:

ZADD key score "member" / ZREVRANGE key 0 -1 WITHSCORES

Working Example:

ZADD leaderboard 2500 "PlayerA" 1800 "PlayerB" / ZREVRANGE leaderboard 0 2 WITHSCORES

# 7 PUBLISH / SUBSCRIBE Pub/Sub

Publish message to channel and subscribe.

Syntax:

PUBLISH channel "msg" / SUBSCRIBE channel

Working Example:

PUBLISH news:updates "New release live!"

# 8 INCR / DECR Strings

Atomically increment or decrement integer key.

Syntax:

INCR key / DECR key

Working Example:

INCR page:views:42

# 9 EXPIRE / TTL Expiration

Set TTL expiration seconds on key and check remaining TTL.

Syntax:

EXPIRE key seconds / TTL key

Working Example:

EXPIRE rate:limit:ip 60 / TTL rate:limit:ip

# 10 DEL Keys

Delete specified key from Redis memory.

Syntax:

DEL key1 key2

Working Example:

DEL cache:user:42

# 11 EXISTS Keys

Check if key exists in memory.

Syntax:

EXISTS key

Working Example:

EXISTS session:active:10

# 12 SCAN Keys

Iterate over database keys safely without blocking.

Syntax:

SCAN cursor MATCH pattern COUNT n

Working Example:

SCAN 0 MATCH user:* COUNT 100

# 13 MULTI / EXEC Transactions

Execute atomic block of commands sequentially.

Syntax:

MULTI ... commands ... EXEC

Working Example:

MULTI; INCR visits; EXPIRE visits 60; EXEC;

# 14 MSET / MGET Strings

Set and get multiple key-value pairs simultaneously.

Syntax:

MSET k1 "v1" k2 "v2" / MGET k1 k2

Working Example:

MSET user:1 "A" user:2 "B" / MGET user:1 user:2

# 15 PFADD / PFCOUNT HyperLogLog

Track unique cardinality with 12KB memory footprint.

Syntax:

PFADD key "val" / PFCOUNT key

Working Example:

PFADD uv:2026-01-01 "ip_1" "ip_2" / PFCOUNT uv:2026-01-01

# 16 GEOADD / GEODIST Geospatial

Store spatial coordinates and measure distance.

Syntax:

GEOADD key long lat "member" / GEODIST key m1 m2 km

Working Example:

GEOADD cities -73.98 40.74 "NYC" -118.24 34.05 "LA" / GEODIST cities NYC LA km

# 17 EVAL (Lua Script) Scripting

Execute atomic server-side Lua script.

Syntax:

EVAL "script" numkeys key1 arg1

Working Example:

EVAL "return redis.call('get', KEYS[1])" 1 mykey

# 18 FLUSHALL Administration

Wipe all keys from all Redis databases.

Syntax:

FLUSHALL [ASYNC]

Working Example:

FLUSHALL ASYNC

# 19 INFO memory DBA

Inspect memory consumption and fragmentation.

Syntax:

INFO memory

Working Example:

INFO memory

# 20 CONFIG GET / SET Administration

Read or alter Redis runtime settings.

Syntax:

CONFIG GET param / CONFIG SET param val

Working Example:

CONFIG GET maxmemory / CONFIG SET maxmemory 2gb