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Redis Commands

Redis commands are used to perform some operations on redis server.

To run commands on redis server you need a redis client. Redis client is available in redis package, which we have installed earlier.

Syntax

Basic syntax of redis client is as follows:

>> redis-cli

Example

Following example explains how we can start redis client.

To start redis client, open terminal and type the command redis-cli. This will connect to your local server and now you can run any command.

>> redis-cli
redis 127.0.0.1:6379> PING
PONG

Various Other Redis Commands

• CLIENT PAUSE timeoutStop processing commands from clients for some time
• CLIENT REPLY ON|OFF|SKIPInstruct the server whether to reply to commands
• CLIENT SETNAME connection-nameSet the current connection name
• CLUSTER ADDSLOTS slot [slot ...]Assign new hash slots to receiving node
• CLUSTER COUNT-FAILURE-REPORTS node-idReturn the number of failure reports active for a given node
• CLUSTER COUNTKEYSINSLOT slotReturn the number of local keys in the specified hash slot
• CLUSTER DELSLOTS slot [slot ...]Set hash slots as unbound in receiving node
• CLUSTER FAILOVER [FORCE|TAKEOVER]Forces a slave to perform a manual failover of its master.
• CLUSTER FORGET node-idRemove a node from the nodes table
• CLUSTER GETKEYSINSLOT slot countReturn local key names in the specified hash slot
• CLUSTER INFO Provides info about Redis Cluster node state
• CLUSTER KEYSLOT keyReturns the hash slot of the specified key
• CLUSTER MEET ip portForce a node cluster to handshake with another node
• CLUSTER NODES Get Cluster config for the node
• CLUSTER REPLICATE node-idReconfigure a node as a slave of the specified master node
• CLUSTER RESET [HARD|SOFT]Reset a Redis Cluster node
• CLUSTER SAVECONFIG Forces the node to save cluster state on disk
• CLUSTER SET-CONFIG-EPOCH config-epochSet the configuration epoch in a new node
• CLUSTER SETSLOT slot IMPORTING|MIGRATING|STABLE|NODE [node-id]Bind a hash slot to a specific node
• CLUSTER SLAVES node-idList slave nodes of the specified master node
• CLUSTER SLOTS Get array of Cluster slot to node mappings
• COMMAND Get array of Redis command details
• COMMAND COUNT Get total number of Redis commands
• COMMAND GETKEYS Extract keys given a full Redis command
• COMMAND INFO command-name [command-name ...]Get array of specific Redis command details
• CONFIG GET parameterGet the value of a configuration parameter
• CONFIG REWRITE Rewrite the configuration file with the in memory configuration
• CONFIG SET parameter valueSet a configuration parameter to the given value
• CONFIG RESETSTAT Reset the stats returned by INFO
• DBSIZE Return the number of keys in the selected database
• DEBUG OBJECT keyGet debugging information about a key
• DEBUG SEGFAULT Make the server crash
• DECR keyDecrement the integer value of a key by one
• DECRBY key decrementDecrement the integer value of a key by the given number
• DEL key [key ...]Delete a key
• DISCARD Discard all commands issued after MULTI
• DUMP keyReturn a serialized version of the value stored at the specified key.
• ECHO messageEcho the given string
• EVAL script numkeys key [key ...] arg [arg ...]Execute a Lua script server side
• EVALSHA sha1 numkeys key [key ...] arg [arg ...]Execute a Lua script server side
• EXEC Execute all commands issued after MULTI
• EXISTS key [key ...]Determine if a key exists
• EXPIRE key secondsSet a key's time to live in seconds
• EXPIREAT key timestampSet the expiration for a key as a UNIX timestamp
• FLUSHALL Remove all keys from all databases
• FLUSHDB Remove all keys from the current database
• GEOADD key longitude latitude member [longitude latitude member ...]Add one or more geospatial items in the geospatial index represented using a sorted set
• GEOHASH key member [member ...]Returns members of a geospatial index as standard geohash strings
• GEOPOS key member [member ...]Returns longitude and latitude of members of a geospatial index
• GEODIST key member1 member2 [unit]Returns the distance between two members of a geospatial index
• GEORADIUS key longitude latitude radius m|km|ft|mi [WITHCOORD] [WITHDIST] [WITHHASH] [COUNT count] [ASC|DESC] [STORE key] [STOREDIST key]Query a sorted set representing a geospatial index to fetch members matching a given maximum distance from a point
• GEORADIUSBYMEMBER key member radius m|km|ft|mi [WITHCOORD] [WITHDIST] [WITHHASH] [COUNT count] [ASC|DESC] [STORE key] [STOREDIST key]Query a sorted set representing a geospatial index to fetch members matching a given maximum distance from a member
• GET keyGet the value of a key
• GETBIT key offsetReturns the bit value at offset in the string value stored at key
• GETRANGE key start endGet a substring of the string stored at a key
• GETSET key valueSet the string value of a key and return its old value
• HDEL key field [field ...]Delete one or more hash fields
• HEXISTS key fieldDetermine if a hash field exists
• HGET key fieldGet the value of a hash field
• HGETALL keyGet all the fields and values in a hash
• HINCRBY key field incrementIncrement the integer value of a hash field by the given number
• HINCRBYFLOAT key field incrementIncrement the float value of a hash field by the given amount
• HKEYS keyGet all the fields in a hash
• HLEN keyGet the number of fields in a hash
• HMGET key field [field ...]Get the values of all the given hash fields
• HMSET key field value [field value ...]Set multiple hash fields to multiple values
• HSET key field valueSet the string value of a hash field
• HSETNX key field valueSet the value of a hash field, only if the field does not exist
• HSTRLEN key fieldGet the length of the value of a hash field
• HVALS keyGet all the values in a hash
• INCR keyIncrement the integer value of a key by one
• INCRBY key incrementIncrement the integer value of a key by the given amount
• INCRBYFLOAT key incrementIncrement the float value of a key by the given amount
• INFO [section]Get information and statistics about the server
• KEYS patternFind all keys matching the given pattern
• LASTSAVE Get the UNIX time stamp of the last successful save to disk
• LINDEX key indexGet an element from a list by its index
• LINSERT key BEFORE|AFTER pivot valueInsert an element before or after another element in a list
• LLEN keyGet the length of a list
• LPOP keyRemove and get the first element in a list
• LPUSH key value [value ...]Prepend one or multiple values to a list
• LPUSHX key valuePrepend a value to a list, only if the list exists
• LRANGE key start stopGet a range of elements from a list
• LREM key count valueRemove elements from a list
• LSET key index valueSet the value of an element in a list by its index
• LTRIM key start stopTrim a list to the specified range
• MGET key [key ...]Get the values of all the given keys
• MIGRATE host port key|"" destination-db timeout [COPY] [REPLACE] [KEYS key [key ...]]Atomically transfer a key from a Redis instance to another one.
• MONITOR Listen for all requests received by the server in real time
• MOVE key dbMove a key to another database
• MSET key value [key value ...]Set multiple keys to multiple values
• MSETNX key value [key value ...]Set multiple keys to multiple values, only if none of the keys exist
• MULTI Mark the start of a transaction block
• OBJECT subcommand [arguments [arguments ...]]Inspect the internals of Redis objects
• PERSIST keyRemove the expiration from a key
• PEXPIRE key millisecondsSet a key's time to live in milliseconds
• PEXPIREAT key milliseconds-timestampSet the expiration for a key as a UNIX timestamp specified in milliseconds
• PFADD key element [element ...]Adds the specified elements to the specified HyperLogLog.
• PFCOUNT key [key ...]Return the approximated cardinality of the set(s) observed by the HyperLogLog at key(s).
• PFMERGE destkey sourcekey [sourcekey ...]Merge N different HyperLogLogs into a single one.
• PING [message]Ping the server
• PSETEX key milliseconds valueSet the value and expiration in milliseconds of a key
• PSUBSCRIBE pattern [pattern ...]Listen for messages published to channels matching the given patterns
• PUBSUB subcommand [argument [argument ...]]Inspect the state of the Pub/Sub subsystem
• PTTL keyGet the time to live for a key in milliseconds
• PUBLISH channel messagePost a message to a channel
• PUNSUBSCRIBE [pattern [pattern ...]]Stop listening for messages posted to channels matching the given patterns
• QUIT Close the connection
• RANDOMKEY Return a random key from the keyspace
• READONLY Enables read queries for a connection to a cluster slave node
• READWRITE Disables read queries for a connection to a cluster slave node
• RENAME key newkeyRename a key
• RENAMENX key newkeyRename a key, only if the new key does not exist
• RESTORE key ttl serialized-value [REPLACE]Create a key using the provided serialized value, previously obtained using DUMP.
• ROLE Return the role of the instance in the context of replication
• RPOP keyRemove and get the last element in a list
• RPOPLPUSH source destinationRemove the last element in a list, prepend it to another list and return it
• RPUSH key value [value ...]Append one or multiple values to a list
• RPUSHX key valueAppend a value to a list, only if the list exists
• SADD key member [member ...]Add one or more members to a set
• SAVE Synchronously save the dataset to disk
• SCARD keyGet the number of members in a set
• SCRIPT DEBUG YES|SYNC|NOSet the debug mode for executed scripts.
• SCRIPT EXISTS script [script ...]Check existence of scripts in the script cache.
• SCRIPT FLUSH Remove all the scripts from the script cache.
• SCRIPT KILL Kill the script currently in execution.
• SCRIPT LOAD scriptLoad the specified Lua script into the script cache.
• SDIFF key [key ...]Subtract multiple sets
• SDIFFSTORE destination key [key ...]Subtract multiple sets and store the resulting set in a key
• SELECT indexChange the selected database for the current connection
• SET key value [EX seconds] [PX milliseconds] [NX|XX]Set the string value of a key
• SETBIT key offset valueSets or clears the bit at offset in the string value stored at key
• SETEX key seconds valueSet the value and expiration of a key
• SETNX key valueSet the value of a key, only if the key does not exist
• SETRANGE key offset valueOverwrite part of a string at key starting at the specified offset
• SHUTDOWN [NOSAVE|SAVE]Synchronously save the dataset to disk and then shut down the server
• SINTER key [key ...]Intersect multiple sets
• SINTERSTORE destination key [key ...]Intersect multiple sets and store the resulting set in a key
• SISMEMBER key memberDetermine if a given value is a member of a set
• SLAVEOF host portMake the server a slave of another instance, or promote it as master
• SLOWLOG subcommand [argument]Manages the Redis slow queries log
• SMEMBERS keyGet all the members in a set
• SMOVE source destination memberMove a member from one set to another
• SORT key [BY pattern] [LIMIT offset count] [GET pattern [GET pattern ...]] [ASC|DESC] [ALPHA] [STORE destination]Sort the elements in a list, set or sorted set
• SPOP key [count]Remove and return one or multiple random members from a set
• SRANDMEMBER key [count]Get one or multiple random members from a set
• SREM key member [member ...]Remove one or more members from a set
• STRLEN keyGet the length of the value stored in a key
• SUBSCRIBE channel [channel ...]Listen for messages published to the given channels
• SUNION key [key ...]Add multiple sets
• SUNIONSTORE destination key [key ...]Add multiple sets and store the resulting set in a key
• SYNC Internal command used for replication
• TIME Return the current server time
• TTL keyGet the time to live for a key
• TYPE keyDetermine the type stored at key
• UNSUBSCRIBE [channel [channel ...]]Stop listening for messages posted to the given channels
• UNWATCH Forget about all watched keys
• WAIT numslaves timeoutWait for the synchronous replication of all the write commands sent in the context of the current connection
• WATCH key [key ...]Watch the given keys to determine execution of the MULTI/EXEC block
• ZADD key [NX|XX] [CH] [INCR] score member [score member ...]Add one or more members to a sorted set, or update its score if it already exists
• ZCARD keyGet the number of members in a sorted set
• ZCOUNT key min maxCount the members in a sorted set with scores within the given values
• ZINCRBY key increment memberIncrement the score of a member in a sorted set
• ZINTERSTORE destination numkeys key [key ...] [WEIGHTS weight [weight ...]] [AGGREGATE SUM|MIN|MAX]Intersect multiple sorted sets and store the resulting sorted set in a new key
• ZLEXCOUNT key min maxCount the number of members in a sorted set between a given lexicographical range
• ZRANGE key start stop [WITHSCORES]Return a range of members in a sorted set, by index
• ZRANGEBYLEX key min max [LIMIT offset count]Return a range of members in a sorted set, by lexicographical range
• ZREVRANGEBYLEX key max min [LIMIT offset count]Return a range of members in a sorted set, by lexicographical range, ordered from higher to lower strings.
• ZRANGEBYSCORE key min max [WITHSCORES] [LIMIT offset count]Return a range of members in a sorted set, by score
• ZRANK key memberDetermine the index of a member in a sorted set
• ZREM key member [member ...]Remove one or more members from a sorted set
• ZREMRANGEBYLEX key min maxRemove all members in a sorted set between the given lexicographical range
• ZREMRANGEBYRANK key start stopRemove all members in a sorted set within the given indexes
• ZREMRANGEBYSCORE key min maxRemove all members in a sorted set within the given scores
• ZREVRANGE key start stop [WITHSCORES]Return a range of members in a sorted set, by index, with scores ordered from high to low
• ZREVRANGEBYSCORE key max min [WITHSCORES] [LIMIT offset count]Return a range of members in a sorted set, by score, with scores ordered from high to low
• ZREVRANK key memberDetermine the index of a member in a sorted set, with scores ordered from high to low
• ZSCORE key memberGet the score associated with the given member in a sorted set
• ZUNIONSTORE destination numkeys key [key ...] [WEIGHTS weight [weight ...]] [AGGREGATE SUM|MIN|MAX]Add multiple sorted sets and store the resulting sorted set in a new key
• SCAN cursor [MATCH pattern] [COUNT count]Incrementally iterate the keys space
• SSCAN key cursor [MATCH pattern] [COUNT count]Incrementally iterate Set elements
• HSCAN key cursor [MATCH pattern] [COUNT count]Incrementally iterate hash fields and associated values
• ZSCAN key cursor [MATCH pattern] [COUNT count]Incrementally iterate sorted sets elements and associated scores