Redis Common Command Manual: server-related commands

　 1. Ping

To test whether the connection survives:

Redis 127.0.0.1:6379> Ping

PONG

Before executing the following command, we stop the Redis server

Redis 127.0.0.1:6379> Ping

Could not connect to Redis at 127.0.0.1:6379:connection refused

Before executing the following command, we start the Redis server

Not connected> Ping

PONG

Redis 127.0.0.1:6379>

The first ping indicates that the connection is normal;

Before the second ping, we stopped the Redis server, then the ping was unsuccessful;

Before the third Ping, we started the Redis server, and the ping was successful.

　　2. Echo

Print some content at the command line:

Redis 127.0.0.1:6379> Echo Hongwan

"Hongwan"

Redis 127.0.0.1:6379>

　3. Select

Select the database. Redis database number from 0~15, we can select any database to access the data.

Redis 127.0.0.1:6379> Select 1

Ok

Redis 127.0.0.1:6379[1]> Select 16

(Error) ERR Invalid DB Index

Redis 127.0.0.1:6379[16]>

When selecting 16 o'clock, an error indicates that there is no database numbered 16.

　　4. Quit

Exits the connection.

Redis 127.0.0.1:6379> quit

[Email protected] redis-2.2.12]#

　　5, Dbsize

Returns the number of keys in the current database.

Redis 127.0.0.1:6379> Dbsize

(integer) 18

Redis 127.0.0.1:6379>

The results show that there are 18 keys in this library.

　　6. Info

Gets the information and statistics of the server.

Redis 127.0.0.1:6379> Info

redis_version:2.2.12

redis_git_sha1:00000000

redis_git_dirty:0

Arch_bits:32

Multiplexing_api:epoll

process_id:28480

uptime_in_seconds:2515

uptime_in_days:0

.

.

.

Redis 127.0.0.1:6379>

This result is used to describe the underlying information for the server, including version, startup time, and so on.

　　7. Monitor

A real-time dump of the received request.

Redis 127.0.0.1:6379> config get dir

1) "Dir"

2) "/root/4setup/redis-2.2.12"

Redis 127.0.0.1:6379>

As you can see from the results, this server currently accepts the command "keys *" and "get Addr".

　　8. config get

Gets the server configuration information.

Redis 127.0.0.1:6379> config get dir

1) "Dir"

2) "/root/4setup/redis-2.2.12"

Redis 127.0.0.1:6379>

In this example, we get the value of the dir parameter configuration, and if you want to get the configuration value of all the parameter data is also very simple, just execute "config get *" To display all the values.

　9, Flushdb

Deletes all keys in the currently selected database.

Redis 127.0.0.1:6379> Dbsize

(integer) 18

Redis 127.0.0.1:6379> Flushdb

Ok

Redis 127.0.0.1:6379> Dbsize

(integer) 0

Redis 127.0.0.1:6379>

In this example, we have cleared the key in database No. 0.

　10, Flushall

Delete all the keys in all databases.

Redis 127.0.0.1:6379[1]> Dbsize

(integer) 1

Redis 127.0.0.1:6379[1]> Select 0

Ok

Redis 127.0.0.1:6379> Flushall

Ok

Redis 127.0.0.1:6379> Select 1

Ok

Redis 127.0.0.1:6379[1]> Dbsize

(integer) 0

Redis 127.0.0.1:6379[1]>

In this example we first looked at a key in database 1th, and then I switched to library No. 0 to execute the flushall command, and the key in library 1th was cleared, saying that the command worked properly.

Redis Common Command Manual: server-related commands