Examples
Ban a player by name
/ban Notch
Ban a random player
/ban @r You have been chosen!
Ban a player by a UUID
/ban c1e4e08e-9f95-466b-9193-6d1b15345355
About
These commands control a server's banlist, or blacklist. A blacklist is a list of players or IP addresses that are not allowed to connect to the server. Bans supersede any whitelisting in place.