6

Is there any way to run a command automatically when a player joins the server? I need to do this without the use of a Bukkit plugin. I think it's possible with MCP but I want to know how!

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First, create a scoreboard objective of type "stat.leaveGame":

/scoreboard objectives add quits stat.leaveGame

Next, put this commands into a always active repeating command block:

/execute as @a[scores={quits=1..}] at @s run <COMMAND TO RUN>

And in a chain command block in the direction that the first command block points to:

/scoreboard players set @a[scores={quits=1..}] quits 0

The command you put in the place of <COMMAND TO RUN> will now run every time a player rejoins the game.

| improve this answer | |
  • This stat is deprecated; can be replaced with /scoreboard objectives add quits minecraft.custom:leave_game – end-user Aug 31 at 22:07
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It's very simple. Using functions it'd look like:

Repeating command block:

execute as @a[tag=!Joined] run function1

function1:

<insert commands>
tag @s add Joined

Using Command Blocks

  1. Repeating, always active:

    execute as @a[tag=!Joined] run <inert command you want to run>
    
  2. Chain, conditional:

    <commands>
    
  3. Chain, conditional

    execute as @a[tag=!Joined] run tag @s add Joined
    
| improve this answer | |
1

The previous answer is good if you want it to run the command every time they join. (i see an exploit if its a good item)

If you only want it to run the command the first time they join, try this:

  1. Run this in the chat:

    /scoreboard objectives add joined dummy
    
  2. In command blocks on a fill clock:

    /scoreboard players add @a joined 0
    /execute @a[score_joined=0] ~ ~ ~ [command you want to run]
    
  3. And finally, this command in a command block powered by a comparator signal from the execute command

    /scoreboard players set @a[score_joined=0] joined 1
    

And this will make sure that the command only runs the first time a player joins the server.

| improve this answer | |
  • Or you can do this as an .mcfunction – Manchineel Oct 5 '17 at 17:17

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