Use websocat:
echo '["REQ", "all", {}]' | websocat wss://a-relay | websocat wss://your-relay
Discussion
Interesting! So I would run this in the same directory as where my relay is running, and it has to be done manually? As in, can this be run as a service periodically? Sorry if these are silly questions!
Thanks! I will save this command to set up my new relay node.
Other useful tool, just shared by fiatjaf: