The Valkey CLI before the client components are composed in, see cli.
Sends its arguments as a command over a connection from a connector and prints the reply. A command without a reply, like SUBSCRIBE, prints the push messages that arrive until interrupted or the connection closes.
UNSUBSCRIBE, PUNSUBSCRIBE and SUNSUBSCRIBE print their confirmations and exit. MONITOR prints its feed until interrupted or the connection closes.
Without arguments, each line of stdin is sent as a command over one connection, kept open until stdin closes, printing replies and push messages as they arrive. Words are split on whitespace, quotes keep a word with whitespace together, e.g. set greeting "hello world".