If using the older Java launcher: You can change your profile settings to keep the launcher open when you play the game: Then, when you're playing, the game launcher will display in the Game Output tab, among other things, chat from players: From there, you are able to copy and paste out anything that was said.
Commands are kind of like a computer language in that they are used by players to tell the game what to do.
Once you have the plugin installed, navigate back to Server Manager and restart your server.
Have you wanted to modify Minecraft's base chat feature to make it more visually appealing? In this case, the game will set the weather to thunder for ten seconds Java Edition or ten ticks Bedrock Edition and then return to clear.