Command is the most common way for users to interact with MCDR. MCDR consider all console input and player chat messages from the server as user inputs. For them, MCDR will try to parse the input as a command

Commands can be registered by MCDR itself and by plugins. This page only introduces about commands from MCDR. For the way to register command for MCDR plugin, check here

!!MCDR command

!!MCDR commands is the way for users to control MCDR on console, or in game. All of these following commands require permission level 3 (admin) to be executed unless extra nodes exist

Assuming you already have the permission to control MCDR, then you can enter !!MCDR to the console or in game chat and you will see the help message of MCDR

If you only have permission level 1 (user) or above, then the version of MCDR will be displayed via !!MCDR command

Status display

!!MCDR status displays the status of MCDR. It will display the following contents:

  • The version of MCDR

  • The state of MCDR

  • The state of the server

  • The flag that displays if the server has started up

  • If MCDR will exit after the server stop, aka if the server exists naturally by itself, or the server is stopped / killed by MCDR

  • The state of rcon connection

  • The amount of loaded plugin

The following status can only be seen by users with permission 4 (owner)

  • The PID of the server. Notices that this PID is the pid of the bash program that the server is running in. Additionally the pid tree will be showed so you can have a look at the process structure of your server

  • Info queue load. If the server is spamming text the queue might be filled

  • The current thread list

Hot reloads

!!MCDR reload sub-commands are the places to hot-reload things. Its short form is !!MCDR r. Directly enter command !!MCDR reload will show the help message of the hot reload commands

Here’s a table of the commands


Short form


!!MCDR reload

!!MCDR r

Show reload command help message

!!MCDR reload plugin

!!MCDR r plg

Reload all changed plugins

!!MCDR reload config

!!MCDR r cfg

Reload config file

!!MCDR reload permission

!!MCDR r perm

Reload permission file

!!MCDR reload all

!!MCDR r all

Reload everything above

Permission management

!!MCDR permission sub-commands are used to manipulate player’s permission. Its short form is !!MCDR perm. Directly enter command !!MCDR perm will show the help message of the permission manipulation commands

Here’s a table of the commands


Short form


!!MCDR permission

!!MCDR perm

Show permission command help message

!!MCDR permission list [<level>]

!!MCDR perm list [<level>]

List all player’s permission. Only list permission level [<level>] if [<level>] has set

!!MCDR permission set <player> <level>

!!MCDR perm set <player> <level>

Set the permission level of <player> to <level>

!!MCDR permission query <player>

!!MCDR perm q [<player>]

Query the permission level of <player>. If <player> is not set, query the permission level of the command sender

!!MCDR permission remove <player>

!!MCDR perm remove <player>

Remove <player> from the permission database

!!MCDR permission setdefault <level>

!!MCDR perm setd <level>

Set the default permission level to <level>

The <player> argument should be a string indicating the name of the player

The <level> argument should be a string or a integer indicating a permission level. It can be a string, the name of the permission, or a integer, the level of the permission


  • !!MCDR perm list 4: List all players with permission level 4 (owner)

  • !!MCDR permission set Steve admin: Set the permission level of player Steve to 3 (admin)

  • !!MCDR permission q Steve: Query the permission level of player Steve. The value should be 3 (admin)

Check the Permission document for more information about MCDR permission system

Plugin management

!!MCDR plugin is the place for user to manipulate plugins. Its short form is !!MCDR plg. Directly enter command !!MCDR plg will show the help message of the commands

Here’s a table of the commands


Short form


!!MCDR plugin list

!!MCDR plg list

List all plugins

!!MCDR plugin info <plugin_id>

!!MCDR plg info <plugin_id>

Display the information of the plugin with id <plugin_id>

!!MCDR plugin load <file_name>

!!MCDR plg load <file_name>

Load a plugin with file path <file_name>

!!MCDR plugin enable <file_name>

!!MCDR plg enable <file_name>

Enable a plugin with file path <file_name>

!!MCDR plugin reload <plugin_id>

!!MCDR plg reload <plugin_id>

Reload a plugin with id <plugin_id>

!!MCDR plugin unload <plugin_id>

!!MCDR plg unload <plugin_id>

Unload a plugin with id <plugin_id>

!!MCDR plugin disable <plugin_id>

!!MCDR plg disable <plugin_id>

Disable a plugin with id <plugin_id>

!!MCDR plugin reloadall

!!MCDR plg ra

Load / Reload / Unloaded all not disabled plugins

The <plugin_id> argument is a string of the unique plugin id of the plugin you want to manipulate

The <file_name> argument is a string of the file name of the plugin file you want to load or enable


Let’s say there’s is a loaded plugin with id my_plugin and a disabled plugin in path plugins/ with id another_plugin

Then you can do the following commands

!!MCDR plg info my_plugin
!!MCDR plugin reload my_plugin
!!MCDR plugin enable
!!MCDR plugin unload another_plugin
!!MCDR plugin load

These commands do the following things:

  1. Query the information about the plugin with id my_plugin

  2. Reload the plugin with id my_plugin

  3. Enable and load the disabled plugin with file name It has plugin id another_plugin

  4. Unload the plugin with id another_plugin

  5. Reload the plugin with file name Note that since this plugin is not loaded, you can only use file name to specify it

Preference settings

!!MCDR preference sub-commands are used to control the preference of MCDR. It only requires permission level 1 (user) to operate

Here’s a table of the commands


Short form


!!MCDR preference

!!MCDR pref

Show preference command help message

!!MCDR preference list

!!MCDR pref list

Display the preference list

!!MCDR preference <pref_name>

!!MCDR pref <pref_name>

Display the details of preference <pref_name>

!!MCDR preference <pref_name> set <value>

!!MCDR pref <pref_name> set <value>

Set the value of preference <pref_name> to <value>

!!MCDR preference <pref_name> reset

!!MCDR pref <pref_name> reset

Reset preference <pref_name> to the default value

See here for more information about MCDR preference


  • !!MCDR pref set language zh_cn: Set the value of preference language to zh_cn

Check update

!!MCDR checkupdate, or !!MCDR cu. Use it to manually check update from github

It will try to get the latest release version in github, and check if it’s newer than the current version. If it is, it will show the update logs from the github release

Server Control

!!MCDR server sub-commands are used control the daemonized server

Here’s a table of the commands



!!MCDR server

Show server control command help message

!!MCDR server start

Start the server

!!MCDR server stop

Stop the server, but keep MCDR running

!!MCDR server stop_exit

Stop the server and exit MCDR

!!MCDR server exit

Exit MCDR. The server should already be stopped

!!MCDR server restart

Restart the server

!!MCDR server kill

Kill the server, and all of its child processes

These commands are also parts of the ServerInterface API


!!MCDR debug contains serval utilities for debugging MCDR or MCDR plugins. They are mostly designed for developers, so you can skip this if you are a MCDR user

Thread Dump

Dump stack trace information of given threads. A easy way to figure out what are your threads doing

You can use #all as the thread name to dump all threads


!!MCDR debug thread_dump #all
!!MCDR debug thread_dump <thread_name>

Translation Test

Query translation results by translation key, or dump all translations within given path


!!MCDR debug translation get <translation_key>
!!MCDR debug translation dump <json_path>


!!MCDR debug translation get
!!MCDR debug translation get server_interface.load_config_simple.succeed
!!MCDR debug translation dump .
!!MCDR debug translation dump mcdr_server
!!MCDR debug translation dump mcdr_server.on_server_stop

Command Tree Display

Dump command trees with print_tree() method

You can filter out command trees to be dumped with plugin id or root node name


!!MCDR debug command_dump all
!!MCDR debug command_dump plugin <plugin_id>
!!MCDR debug command_dump node <literal_name>


!!MCDR debug command_dump plugin my_plugin
!!MCDR debug command_dump node !!MyCommand

!!help command

!!help command is place to display the help messages of all commands. It works as an index of all commands

The content of this command can be registered by plugins, so a new user can easily browse all available commands that it can access

Any user is allowed to use this command, and MCDR will list all command help messages that the user has enough permission level to see

Without any plugin, you may see the result below after you entered the !!help command

MCDR command help message list
!!MCDR: MCDR control command
!!help: MCDR command help messages