So, again you are here to learn something new about wordpress website isn’t it.
Here’s a short tip that helps you to restrict access to the plugin and them updating capability within wordpress, as well as remove the ability for users to install new plugins and themes.
Why would you want to do this? Perhaps you’ve set up a WordPress site for a client and you don’t want them mindlessly upgrading without determining the compatibility of their theme or plugins. Poorly executed upgrades can cause a host of issues that you will more than likely be called upon to fix.
Add this constant somewhere to your wp-config.php file to disable plugin and theme updates/installation:
define('DISALLOW_FILE_MODS',true); // code for disable installation theme and plugin.