Redis have two main usage types. One is using API provided by redis these API’s can be used by different programming languages like Python, Php C#, Java etc. Other way to interact with redis is using cli tool named redis cli. Redis cli provides simple command line interface to test, use, troubleshot redis service.
Specify IP Address
redis-cli will connect localhost or 127.0.0.1 IP address by default. We can also specify the IP address we want to connect explicitly with
-h option. In this example we will connect IP address 192.168.122.11
$ redis-cli -h 192.168.122.11
redis-cli will connect TCP port 6379 by default. If the redis server is listening different than 6379 we can specify the port number explicitly with
-p option. In this example we will connect to port number 7000 .
$ redis-cli -h 192.168.122.11 -p 7000
Redis server have some security measures to protect against attackers. Password is one of them . If we set a password for the redis we should provide it with
-a option while connecting. In this example we will use
sosecret as password.
$ redis-cli -a "sosecret"
Check with PING
redis-cli provides a health check functionality named PING . We can use PING like below. It will simply return PONG if everything is OK.
$ redis-cli PING
redis-cli provides interactive mode where we get a redis shell after connected to the redis server. This shell provides all commands batch mode have. We can write redis commands and get information with interactive mode in real time. In order to start interactive shell mode we will simply connect to the redis server and do not provide any command. But if needed we should provides options like host, port or password information.
Batch mode is alternative to the interactive mode. In batch mode we will provide the commands we want to run to the redis-cli directly. This commands output will be printed to the current operating system shell like bash, ms dos etc. We should provide the command we want to run after options. In this example we will list redis help in batch mode. We should also provide the hostname, port and password options if needed.
$ redis-cli help