redis

Install Redis

Install latest Redis on Ubuntu/Debian Server
Install Redis on Plesk Debian Server
Install Redis from Source

How Tos

Installing Redis PHP module CentOS 7
Connect to redis from PHP
Monitor redis with redis-cli
redis commander – Web GUI for Redis
How to find Redis data directory
How to flush Redis cache
Redis error currently not able to persist on disk

Checking if Redis works

# telnet 127.0.0.1 6379
set testkey 10
get testkey

Example

root@ip-10-0-0-31:~# telnet news24redis.cylrbg.0001.use1.cache.amazonaws.com 6379
Trying 10.0.0.223...
Connected to news24redis.cylrbg.0001.use1.cache.amazonaws.com.
Escape character is '^]'.
set testkey 10
+OK
get testkey
$2
10
quit
+OK
Connection closed by foreign host.
root@ip-10-0-0-31:~# 

Count Number of Keys

To count number of keys, use

DBSIZE

Example

root@ip-10-0-0-31:~# telnet news24redis.cylrbg.0001.use1.cache.amazonaws.com 6379
Trying 10.0.0.223...
Connected to news24redis.cylrbg.0001.use1.cache.amazonaws.com.
Escape character is '^]'.
DBSIZE
:4114

Here DBSIZE returned 4114, that means you have that much key/value stored in redis.

Flush ALl

To flush all keys, use

redis-cli flushall