There are seven sub-commands available for the plugin command:

• vagrant plugin expunge: Removes all user-installed plugins. This will remove any data and dependencies associated with them. This is a useful command if you wish to delete them all in one go.
• vagrant plugin install [INSERT VALUE]: Installs a plugin by supplying its name as the command's parameter. You can install a plugin from a known Gem or from a local Gem file on your system.
• vagrant plugin license [INSERT VALUE] [INSERT VALUE]: Installs a proprietary Vagrant plugin license. The first parameter is the plugin name and the second is the licence file.
• vagrant plugin list: Lists all installed plugins on your system. It will list plugin information, such as its version. This command is useful for finding out which plugins and versions you have installed.
• vagrant plugin repair: Attempts to repair any plugins where there has been an issue and it is not working correctly. The issue could be during the installation of a custom plugin or an error with the plugins.json file.
• vagrant plugin uninstall [INSERT VALUE]: Deletes a plugin using a supplied plugin name as the first parameter. This command supports multiple parameters, with each one being a plugin name. You can delete one or multiple plugins using this command.
• vagrant plugin update [INSERT VALUE]: Updates a specific plugin if the first parameter is supplied as the plugin's name. If no parameter is supplied, this command will update all installed plugins.