Common Commands

Key Commands

Command	Description
SET key value	Set a key to hold a string value.
GET key	Get the value of a key.
DEL key	Delete a key.
EXISTS key	Check if a key exists.
EXPIRE key seconds	Set a timeout on a key.
TTL key	Get the remaining time to live of a key.
KEYS pattern	Find all keys matching a pattern (e.g., user:*).
TYPE key	Determine the type stored at key.

String Commands

Command	Description
APPEND key value	Append a value to a string key.
INCR key	Increment a key's integer value by one.
DECR key	Decrement a key's integer value by one.
MGET key1 key2	Get values of multiple keys.
MSET key1 value1 key2 value2	Set multiple keys at once.

Hash Commands

Command	Description
HSET key field value	Set the value of a hash field.
HGET key field	Get the value of a hash field.
HMSET key field1 value1 ...	Set multiple fields in a hash. (Deprecated, use HSET instead)
HGETALL key	Get all fields and values in a hash.
HDEL key field	Delete one or more hash fields.
HEXISTS key field	Determine if a hash field exists.

• field: the field inside the hash to set

If you want to set multiple fields at once, you can do:

HSET name firstName masum lastName billah

List Commands

Command	Description
LPUSH key value	Insert value at the head of the list.
RPUSH key value	Insert value at the tail of the list.
LPOP key	Remove and get the first element.
RPOP key	Remove and get the last element.
LRANGE key start stop	Get elements between two indices.
LLEN key	Get the length of the list.

Set Commands

Command	Description
SADD key member	Add one or more members to a set.
SMEMBERS key	Get all members of a set.
SREM key member	Remove one or more members from a set.
SISMEMBER key member	Check if a member exists in the set.
SCARD key	Get the number of members.

Sorted Set (ZSet) Commands

Command	Description
ZADD key score member	Add a member with a score.
ZRANGE key start stop	Get members by index range.
ZRANGEBYSCORE key min max	Get members by score range.
ZREM key member	Remove member from sorted set.
ZCARD key	Get number of members.

Pub/Sub Commands

Command	Description
PUBLISH channel message	Post a message to a channel.
SUBSCRIBE channel	Subscribe to a channel.
UNSUBSCRIBE channel	Unsubscribe from a channel.

Server/Utility Commands

Command	Description
PING	Test connection.
INFO	Get information about the server.
FLUSHALL	Delete all keys in all databases.
FLUSHDB	Delete all keys in the current DB.
MONITOR	See all requests received by the server in real time.