Basic Minecraft console commands
There are many default commands that are available for Minecraft servers within your Control Panel.
Here is some of the bascis commands you can use :
Command to OP a player :op playername
(where playername is the minecraft username used in game)
Command to remove OP from a player :deop playername
Command to kick a player with a reason :kick player reason
Command to ban a player with a reason :ban player reason
Command to unban someone :pardon player
Command to ban someone's IP address from accessing your server :ban-ip ipaddress
Command to set a player's game mode : gamemode 0 / 1 /2 playername
0 : Survival
1 : Creative
2 : Adventure
Command to give a player a certain item(s) :give playername item amount
item : Item ID (See Minecraft ID List)
amount : It is the amount of the item that you want to give.
Command to teleport one player to another :tp target destination
target : Specifies the entity(s) to be teleported. Must be either a player name or a target selector.
destination : Specifies the entity to teleport the target(s) to. Must be either a player name or a target selector.
Command to give a certain player experience :xp amount playername
If you want the complete list of availables commands to use for Minecraft, please visit https://minecraft.gamepedia.com/Commands.