Retrieving/Listing all key/value pairs in a Redis db

From the command line, you can also use the dump command, available since Redis 2.6.0

redis-cli KEYS \* | xargs -n 1 redis-cli dump

(note that this also works with the get command for earlier versions if you don't mind)

UPDATE (V2.8 or greater): SCAN is a superior alternative to KEYS, in the sense that it does not block the server nor does it consume significant resources. Prefer using it.

You can explore the Redis dataset using the redis-cli tool included in the Redis distribution.

Just start the tool without arguments, then type commands to explore the dataset.

For instance KEYS will list all the keys matching a glob-style pattern, for instance with: keys * you'll see all the keys available.

Then you can use the TYPE command to check what type is a given key, if it's a list you can retrieve the elements inside using LRANGE mykey 0 -1. If it is a Set you'll use instead SMEMBERS mykey and so forth. Check the Redis documentation for a list of all the available commands and how they work.

Just adding a practical ruby example to the antirez response (I won't dare compete with him)

irb(main):002:0> require 'rubygems'
=> true
irb(main):003:0> require 'redis'
=> true
irb(main):004:0> r = Redis.new
=> #<Redis:0x8605b64 @sock=#<TCPSocket:0x8605ab0>, @timeout=5, @port=6379, @db=0, @host="127.0.0.1">
irb(main):005:0> r.keys('*')