Summary of linux redis daily work orders – View the Redis installation path KEYS/RENAME/DEL/EXISTS/MOVE/RENAMENX: China manufacture for Popular Custom Vape Pen, high quality battery, quality e-liquid and food safty material. Prefilled Vape Newmax Electronics Co.,Limited , https://www.advvape.com
Whereis redis
– View the redis client installation path
Whereis redis-cli
– View the Redis service installation path
Whereis redis-server
– Start the redis client and redis service in the redis installation directory (for example: /usr/local/redis/bin)
– start the server
./redis-server
– start the client
./redis-cli
– Launch the Redis client tool from the shell command line.
/> redis-cli
– Empty the currently selected database for easy understanding of the examples that follow.
Redis 127.0.0.1:6379> flushdb
OK
– Add analog data of type String.
Redis 127.0.0.1:6379> set mykey 2
OK
Redis 127.0.0.1:6379> set mykey2 “helloâ€
OK
– Add analog data of type Set.
Redis 127.0.0.1:6379> sadd mysetkey 1 2 3
(integer) 3
– Add simulation data of the hash type.
Redis 127.0.0.1:6379> hset mmtest username “stephenâ€
(integer) 1
– According to the mode in the parameter, all the keys in the current database that match the mode are obtained. As can be seen from the output, the command does not distinguish the Value type associated with the Key when executed.
Redis 127.0.0.1:6379> keys my*
1) "mysetkey"
2) "mykey"
3) "mykey2"
– Two Keys have been deleted.
Redis 127.0.0.1:6379> del mykey mykey2
(integer) 2
- Check to see if the Key you just deleted still exists. From the returned results, mykey has indeed been deleted.
Redis 127.0.0.1:6379> exists mykey
(integer) 0
- Check the Keys that have not been deleted to compare them with the results of the above command.
Redis 127.0.0.1:6379> exists mysetkey
(integer) 1
– Move the mysetkey key in the current database to the database with ID 1, and you can see that the move has been successful.
Redis 127.0.0.1:6379> move mysetkey 1
(integer) 1
– Open the database with ID 1.
Redis 127.0.0.1:6379> select 1
OK
- Check to see if the key that has just been moved exists, and it looks like it already exists.
Redis 127.0.0.1:6379[1]> exists mysetkey
(integer) 1
– Reopen the default database with ID 0.
Redis 127.0.0.1:6379[1]> select 0
OK
– Check to see if the Key you just removed does not exist. It has been removed from the results.
Redis 127.0.0.1:6379> exists mysetkey
(integer) 0
– Prepare new test data.
Redis 127.0.0.1:6379> set mykey “helloâ€
OK
– rename mykey to mykey1
Redis 127.0.0.1:6379> rename mykey mykey1
OK
– Since mykey has been renamed, getting again will return nil.
Redis 127.0.0.1:6379> get mykey
(nil)
– Get with the new key name.
Redis 127.0.0.1:6379> get mykey1
"hello"
– Since mykey no longer exists, an error message is returned.
Redis 127.0.0.1:6379> rename mykey mykey1
(error) ERR no such key
– Prepare test keys for renamenx
Redis 127.0.0.1:6379> set oldkey “helloâ€
OK
Redis 127.0.0.1:6379> set newkey “worldâ€
OK
– The command failed to execute successfully because newkey already exists.
Redis 127.0.0.1:6379> renamenx oldkey newkey
(integer) 0
– Look at the value of newkey and find that it is not overwritten by renamenx.
Redis 127.0.0.1:6379> get newkey
"world"