PSUBSCRIBE pattern [pattern ...]
Listen for messages published to channels matching the given patterns
PUBSUB subcommand [argument [argument ...]]
Inspect the state of the Pub/Sub subsystem
PUBLISH channel message
Post a message to a channel
PUNSUBSCRIBE [pattern [pattern ...]]
Stop listening for messages posted to channels matching the given patterns
SUBSCRIBE channel [channel ...]
Listen for messages published to the given channels
UNSUBSCRIBE [channel [channel ...]]
Stop listening for messages posted to the given channels