1. Server Info & Management

Description: Core commands to inspect, manage, or control the Redis server instance. Used for debugging, server monitoring, runtime config changes, and shutdowns.

Command	Type	Description / Use Case
`PING`	Server	Test if Redis server is running. Returns `PONG`.
`INFO`	Server	Get server info & statistics (memory, clients, persistence, CPU).
`MONITOR`	Server	Real-time command monitoring (debugging).
`CONFIG GET <parameter>`	Server	Get server config value.
`CONFIG SET <parameter> <value>`	Server	Change server config at runtime.
`SHUTDOWN`	Server	Stop the Redis server.
`FLUSHALL`	Server	Delete all keys in all databases (dangerous!).
`FLUSHDB`	Server	Delete all keys in current database.
`CLIENT LIST`	Server	List connected clients.
`CLIENT KILL <ip:port>`	Server	Kill client connections.

2. Database Management (DB Switching & Keys)

Description: Commands to manage Redis logical databases, switch between them, inspect database stats, and move/scan keys.

Commands:

Command	Purpose
`CONFIG GET databases`	Show total DB count
`SELECT <index>`	Switch DB
`KEYS *`	List all keys
`SCAN 0 MATCH pattern`	Safe key scan
`DBSIZE`	Count keys in DB
`MOVE key index`	Move key to another DB
`FLUSHDB`	Clear current DB
`FLUSHALL`	Clear all DBs
`INFO keyspace`	Show DB stats
`CLIENT INFO`	Show current DB through `db=X`

3. Key Management

Description: Commands that manage keys, TTLs, types, existence, renaming, or expiration behavior.

Command	Type	Use Case
`KEYS <pattern>`	Keys	Find keys matching pattern (slow for production).
`SCAN <cursor> [MATCH pattern] [COUNT n]`	Keys	Incremental iteration over keys (safer than `KEYS`).
`DEL <key>`	Keys	Delete a key.
`EXISTS <key>`	Keys	Check if key exists.
`TYPE <key>`	Keys	Check key data type.
`RENAME <old> <new>`	Keys	Rename a key.
`EXPIRE <key> <seconds>`	Keys	Set key TTL in seconds.
`TTL <key>`	Keys	Get remaining TTL.
`PERSIST <key>`	Keys	Remove TTL, make key persistent.

4. String Commands

Description: Basic key-value operations; strings are Redis' most used type, supporting counters, tokens, JSON, serialized data, etc.

Command	Type	Use Case
`SET key value`	String	Store a string.
`GET key`	String	Retrieve string.
`SETEX key seconds value`	String	Set string with expiration.
`MSET key1 value1 key2 value2 ...`	String	Set multiple strings at once.
`MGET key1 key2 ...`	String	Get multiple strings.
`INCR key`	String	Increment integer value by 1.
`DECR key`	String	Decrement integer value by 1.
`APPEND key value`	String	Append to existing string.
`STRLEN key`	String	Get string length.

5. Hash Commands

Description: Hashes are like small JSON objects or maps—used for user profiles, configs, small structured objects.

Command	Type	Use Case
`HSET key field value`	Hash	Set a field in hash.
`HGET key field`	Hash	Get field value.
`HMSET key field1 val1 field2 val2 ...`	Hash	Set multiple fields.
`HMGET key field1 field2 ...`	Hash	Get multiple fields.
`HDEL key field`	Hash	Delete field from hash.
`HEXISTS key field`	Hash	Check if field exists.
`HGETALL key`	Hash	Get all fields + values.
`HKEYS key`	Hash	Get all field names.
`HVALS key`	Hash	Get all field values.
`HLEN key`	Hash	Number of fields in hash.

6. List Commands

Description: Lists allow queues, stacks, job pipelines, FIFO/LIFO, and streams of items.

Command	Type	Use Case
`LPUSH key value`	List	Push element to the left (start).
`RPUSH key value`	List	Push element to the right (end).
`LPOP key`	List	Pop element from left.
`RPOP key`	List	Pop element from right.
`LRANGE key start stop`	List	Get range of elements.
`LLEN key`	List	Get list length.
`LREM key count value`	List	Remove elements by value.
`LTRIM key start stop`	List	Trim list to given range.

7. Set Commands

Description: Unique, unordered collections. Great for unique items, tags, memberships, etc.

Command	Type	Use Case
`SADD key member`	Set	Add member.
`SREM key member`	Set	Remove member.
`SISMEMBER key member`	Set	Check if member exists.
`SMEMBERS key`	Set	Get all members.
`SCARD key`	Set	Number of members.
`SPOP key [count]`	Set	Pop random member(s).
`SRANDMEMBER key [count]`	Set	Get random member(s) without removing.
`SUNION key1 key2 ...`	Set	Union of sets.
`SINTER key1 key2 ...`	Set	Intersection of sets.
`SDIFF key1 key2 ...`	Set	Difference of sets.

8. Sorted Set (ZSet) Commands

Description: Ordered sets where each member has a score. Used for ranking, leaderboards, priorities, expirations.

Command	Type	Use Case
`ZADD key score member`	Sorted Set	Add member with score.
`ZREM key member`	Sorted Set	Remove member.
`ZRANGE key start stop [WITHSCORES]`	Sorted Set	Get range by rank.
`ZREVRANGE key start stop [WITHSCORES]`	Sorted Set	Get range by rank descending.
`ZRANGEBYSCORE key min max [WITHSCORES]`	Sorted Set	Get range by score.
`ZREVRANGEBYSCORE key max min`	Sorted Set	Get range by score descending.
`ZSCORE key member`	Sorted Set	Get member score.
`ZCARD key`	Sorted Set	Count of members.
`ZCOUNT key min max`	Sorted Set	Count members in score range.
`ZINCRBY key increment member`	Sorted Set	Increment score of a member.

9. HyperLogLog Commands

Description: Approximate unique counting with extremely small memory footprint. Great for analytics.

Command	Type	Use Case
`PFADD key element [element ...]`	HyperLogLog	Add elements.
`PFCOUNT key [key ...]`	HyperLogLog	Count approximate unique elements.
`PFMERGE destkey sourcekey [sourcekey ...]`	HyperLogLog	Merge multiple HyperLogLogs.

10. Pub/Sub Commands

Description: Messaging system built into Redis for subscribers and publishers.

Command	Type	Use Case
`PUBLISH channel message`	Pub/Sub	Publish message to channel.
`SUBSCRIBE channel [channel ...]`	Pub/Sub	Subscribe to channel(s).
`PSUBSCRIBE pattern [pattern ...]`	Pub/Sub	Subscribe to pattern.
`UNSUBSCRIBE [channel ...]`	Pub/Sub	Unsubscribe from channels.
`PUNSUBSCRIBE [pattern ...]`	Pub/Sub	Unsubscribe from patterns.

11. Transactions & Pipelining

Description: Execute commands atomically or send multiple commands without waiting for responses.

Command	Type	Use Case
`MULTI`	Transaction	Start transaction block.
`EXEC`	Transaction	Execute queued commands.
`DISCARD`	Transaction	Discard transaction.
`WATCH key [key ...]`	Transaction	Watch keys for changes.
`UNWATCH`	Transaction	Unwatch all keys.

12. Scripting (Lua)

Description: Run server-side scripts for atomic logic and batching.

13. Streams Commands

Description: Append-only log data structure for event processing, message queues, and real-time pipelines.

Command	Type	Use Case
`XADD key ID field value [field value ...]`	Stream	Add entry to stream.
`XREAD COUNT n STREAMS key [key ...] ID [ID ...]`	Stream	Read entries.
`XDEL key ID [ID ...]`	Stream	Delete entry by ID.
`XLEN key`	Stream	Get stream length.
`XRANGE key start end [COUNT n]`	Stream	Get entries in range.
`XREVRANGE key end start [COUNT n]`	Stream	Get entries in reverse.

14. Geo Commands

Description: Store geospatial coordinates, get distances, radius queries, etc.

Command	Type	Use Case
`GEOADD key longitude latitude member`	Geo	Add geo location.
`GEOPOS key member [member ...]`	Geo	Get coordinates.
`GEODIST key member1 member2 [unit]`	Geo	Distance between members.
`GEORADIUS key lon lat radius unit [WITHCOORD] [WITHDIST] [WITHHASH]`	Geo	Query by radius.
`GEORADIUSBYMEMBER key member radius unit ...`	Geo	Query by member location.

15. Bitmaps Commands

Description: Store user activity logs, tracking bits, analytics, boolean states efficiently.

Command	Type	Use Case
`SETBIT key offset value`	Bitmap	Set bit at offset.
`GETBIT key offset`	Bitmap	Get bit at offset.
`BITCOUNT key [start end]`	Bitmap	Count bits set to 1.
`BITOP operation destkey key [key ...]`	Bitmap	Perform AND/OR/XOR/NOT on keys.

16. Connection & Client Commands

Command	Type	Use Case
`AUTH password`	Connection	Authenticate with password.
`SELECT index`	Connection	Switch database index (0-15 default).
`QUIT`	Connection	Close connection.

17. Memory & Performance

Description: Useful for debugging performance issues, memory leaks, fragmentation, and optimization.

Command	Type	Use Case
`MEMORY USAGE key`	Memory	Memory used by a key.
`MEMORY STATS`	Memory	Redis memory statistics.
`MEMORY PURGE`	Memory	Purge unused memory.
`LATENCY DOCTOR`	Performance	Suggest latency improvements.

This cheat sheet covers almost everything Redis supports in CLI, including Strings, Hashes, Lists, Sets, Sorted Sets, Pub/Sub, Streams, Geo, Bitmaps, HyperLogLog, Transactions, Scripting, Memory & Server management.

1. Server Info & Management

Description: Core commands to inspect, manage, or control the Redis server instance. Used for debugging, server monitoring, runtime config changes, and shutdowns.

Command	Type	Description / Use Case
`PING`	Server	Test if Redis server is running. Returns `PONG`.
`INFO`	Server	Get server info & statistics (memory, clients, persistence, CPU).
`MONITOR`	Server	Real-time command monitoring (debugging).
`CONFIG GET <parameter>`	Server	Get server config value.
`CONFIG SET <parameter> <value>`	Server	Change server config at runtime.
`SHUTDOWN`	Server	Stop the Redis server.
`FLUSHALL`	Server	Delete all keys in all databases (dangerous!).
`FLUSHDB`	Server	Delete all keys in current database.
`CLIENT LIST`	Server	List connected clients.
`CLIENT KILL <ip:port>`	Server	Kill client connections.

2. Database Management (DB Switching & Keys)

Description: Commands to manage Redis logical databases, switch between them, inspect database stats, and move/scan keys.

Commands:

Command	Purpose
`CONFIG GET databases`	Show total DB count
`SELECT <index>`	Switch DB
`KEYS *`	List all keys
`SCAN 0 MATCH pattern`	Safe key scan
`DBSIZE`	Count keys in DB
`MOVE key index`	Move key to another DB
`FLUSHDB`	Clear current DB
`FLUSHALL`	Clear all DBs
`INFO keyspace`	Show DB stats
`CLIENT INFO`	Show current DB through `db=X`

3. Key Management

Description: Commands that manage keys, TTLs, types, existence, renaming, or expiration behavior.

Command	Type	Use Case
`KEYS <pattern>`	Keys	Find keys matching pattern (slow for production).
`SCAN <cursor> [MATCH pattern] [COUNT n]`	Keys	Incremental iteration over keys (safer than `KEYS`).
`DEL <key>`	Keys	Delete a key.
`EXISTS <key>`	Keys	Check if key exists.
`TYPE <key>`	Keys	Check key data type.
`RENAME <old> <new>`	Keys	Rename a key.
`EXPIRE <key> <seconds>`	Keys	Set key TTL in seconds.
`TTL <key>`	Keys	Get remaining TTL.
`PERSIST <key>`	Keys	Remove TTL, make key persistent.

4. String Commands

Description: Basic key-value operations; strings are Redis' most used type, supporting counters, tokens, JSON, serialized data, etc.

Command	Type	Use Case
`SET key value`	String	Store a string.
`GET key`	String	Retrieve string.
`SETEX key seconds value`	String	Set string with expiration.
`MSET key1 value1 key2 value2 ...`	String	Set multiple strings at once.
`MGET key1 key2 ...`	String	Get multiple strings.
`INCR key`	String	Increment integer value by 1.
`DECR key`	String	Decrement integer value by 1.
`APPEND key value`	String	Append to existing string.
`STRLEN key`	String	Get string length.

5. Hash Commands

Description: Hashes are like small JSON objects or maps—used for user profiles, configs, small structured objects.

Command	Type	Use Case
`HSET key field value`	Hash	Set a field in hash.
`HGET key field`	Hash	Get field value.
`HMSET key field1 val1 field2 val2 ...`	Hash	Set multiple fields.
`HMGET key field1 field2 ...`	Hash	Get multiple fields.
`HDEL key field`	Hash	Delete field from hash.
`HEXISTS key field`	Hash	Check if field exists.
`HGETALL key`	Hash	Get all fields + values.
`HKEYS key`	Hash	Get all field names.
`HVALS key`	Hash	Get all field values.
`HLEN key`	Hash	Number of fields in hash.

6. List Commands

Description: Lists allow queues, stacks, job pipelines, FIFO/LIFO, and streams of items.

Command	Type	Use Case
`LPUSH key value`	List	Push element to the left (start).
`RPUSH key value`	List	Push element to the right (end).
`LPOP key`	List	Pop element from left.
`RPOP key`	List	Pop element from right.
`LRANGE key start stop`	List	Get range of elements.
`LLEN key`	List	Get list length.
`LREM key count value`	List	Remove elements by value.
`LTRIM key start stop`	List	Trim list to given range.

7. Set Commands

Description: Unique, unordered collections. Great for unique items, tags, memberships, etc.

Command	Type	Use Case
`SADD key member`	Set	Add member.
`SREM key member`	Set	Remove member.
`SISMEMBER key member`	Set	Check if member exists.
`SMEMBERS key`	Set	Get all members.
`SCARD key`	Set	Number of members.
`SPOP key [count]`	Set	Pop random member(s).
`SRANDMEMBER key [count]`	Set	Get random member(s) without removing.
`SUNION key1 key2 ...`	Set	Union of sets.
`SINTER key1 key2 ...`	Set	Intersection of sets.
`SDIFF key1 key2 ...`	Set	Difference of sets.

8. Sorted Set (ZSet) Commands

Description: Ordered sets where each member has a score. Used for ranking, leaderboards, priorities, expirations.

Command	Type	Use Case
`ZADD key score member`	Sorted Set	Add member with score.
`ZREM key member`	Sorted Set	Remove member.
`ZRANGE key start stop [WITHSCORES]`	Sorted Set	Get range by rank.
`ZREVRANGE key start stop [WITHSCORES]`	Sorted Set	Get range by rank descending.
`ZRANGEBYSCORE key min max [WITHSCORES]`	Sorted Set	Get range by score.
`ZREVRANGEBYSCORE key max min`	Sorted Set	Get range by score descending.
`ZSCORE key member`	Sorted Set	Get member score.
`ZCARD key`	Sorted Set	Count of members.
`ZCOUNT key min max`	Sorted Set	Count members in score range.
`ZINCRBY key increment member`	Sorted Set	Increment score of a member.

9. HyperLogLog Commands

Description: Approximate unique counting with extremely small memory footprint. Great for analytics.

Command	Type	Use Case
`PFADD key element [element ...]`	HyperLogLog	Add elements.
`PFCOUNT key [key ...]`	HyperLogLog	Count approximate unique elements.
`PFMERGE destkey sourcekey [sourcekey ...]`	HyperLogLog	Merge multiple HyperLogLogs.

10. Pub/Sub Commands

Description: Messaging system built into Redis for subscribers and publishers.

Command	Type	Use Case
`PUBLISH channel message`	Pub/Sub	Publish message to channel.
`SUBSCRIBE channel [channel ...]`	Pub/Sub	Subscribe to channel(s).
`PSUBSCRIBE pattern [pattern ...]`	Pub/Sub	Subscribe to pattern.
`UNSUBSCRIBE [channel ...]`	Pub/Sub	Unsubscribe from channels.
`PUNSUBSCRIBE [pattern ...]`	Pub/Sub	Unsubscribe from patterns.

11. Transactions & Pipelining

Description: Execute commands atomically or send multiple commands without waiting for responses.

Command	Type	Use Case
`MULTI`	Transaction	Start transaction block.
`EXEC`	Transaction	Execute queued commands.
`DISCARD`	Transaction	Discard transaction.
`WATCH key [key ...]`	Transaction	Watch keys for changes.
`UNWATCH`	Transaction	Unwatch all keys.

12. Scripting (Lua)

Description: Run server-side scripts for atomic logic and batching.

13. Streams Commands

Description: Append-only log data structure for event processing, message queues, and real-time pipelines.

Command	Type	Use Case
`XADD key ID field value [field value ...]`	Stream	Add entry to stream.
`XREAD COUNT n STREAMS key [key ...] ID [ID ...]`	Stream	Read entries.
`XDEL key ID [ID ...]`	Stream	Delete entry by ID.
`XLEN key`	Stream	Get stream length.
`XRANGE key start end [COUNT n]`	Stream	Get entries in range.
`XREVRANGE key end start [COUNT n]`	Stream	Get entries in reverse.

14. Geo Commands

Description: Store geospatial coordinates, get distances, radius queries, etc.

Command	Type	Use Case
`GEOADD key longitude latitude member`	Geo	Add geo location.
`GEOPOS key member [member ...]`	Geo	Get coordinates.
`GEODIST key member1 member2 [unit]`	Geo	Distance between members.
`GEORADIUS key lon lat radius unit [WITHCOORD] [WITHDIST] [WITHHASH]`	Geo	Query by radius.
`GEORADIUSBYMEMBER key member radius unit ...`	Geo	Query by member location.

15. Bitmaps Commands

Description: Store user activity logs, tracking bits, analytics, boolean states efficiently.

Command	Type	Use Case
`SETBIT key offset value`	Bitmap	Set bit at offset.
`GETBIT key offset`	Bitmap	Get bit at offset.
`BITCOUNT key [start end]`	Bitmap	Count bits set to 1.
`BITOP operation destkey key [key ...]`	Bitmap	Perform AND/OR/XOR/NOT on keys.

16. Connection & Client Commands

Command	Type	Use Case
`AUTH password`	Connection	Authenticate with password.
`SELECT index`	Connection	Switch database index (0-15 default).
`QUIT`	Connection	Close connection.

17. Memory & Performance

Description: Useful for debugging performance issues, memory leaks, fragmentation, and optimization.

Command	Type	Use Case
`MEMORY USAGE key`	Memory	Memory used by a key.
`MEMORY STATS`	Memory	Redis memory statistics.
`MEMORY PURGE`	Memory	Purge unused memory.
`LATENCY DOCTOR`	Performance	Suggest latency improvements.

Redis Cheat Sheet & Quick Reference

1. Server Info & Management

2. Database Management (DB Switching & Keys)

3. Key Management

4. String Commands

5. Hash Commands

6. List Commands

7. Set Commands

8. Sorted Set (ZSet) Commands

9. HyperLogLog Commands

10. Pub/Sub Commands

11. Transactions & Pipelining

12. Scripting (Lua)

13. Streams Commands

14. Geo Commands

15. Bitmaps Commands

16. Connection & Client Commands

17. Memory & Performance

Related Articles

Redis Cheat Sheet & Quick Reference

1. Server Info & Management

2. Database Management (DB Switching & Keys)

3. Key Management

4. String Commands

5. Hash Commands

6. List Commands

7. Set Commands

8. Sorted Set (ZSet) Commands

9. HyperLogLog Commands

10. Pub/Sub Commands

11. Transactions & Pipelining

12. Scripting (Lua)

13. Streams Commands

14. Geo Commands

15. Bitmaps Commands

16. Connection & Client Commands

17. Memory & Performance

Related Articles