4th of 4 Questions.
What is the difference between redis-server and redis-cli?
redis-server is the daemon process that runs the Redis instance, reads the config file, and listens on a port (default 6379). redis-cli is the command-line client that connects to a running server. Key redis-cli flags worth knowing: --scan (keyspace iteration), --bigkeys (find large keys), --latency (measure latency), --stat (live stats), --pipe (bulk insert via Redis protocol), -n <db> (select database number).