[FIXED] WordPress administrator not allowed to update or install plugins

This is just a tip, as this is not a bug, but a feature.

So if you are WordPress admin user, but you miss some menu links, especially for wordpress update, plugin install and so  Рyou might fear, that you have been hacked, but no Рmost likely in wp-config.php you have disabled file modification. Look for these lines and change from true to false.

define('DISALLOW_FILE_EDIT', false);
define('DISALLOW_FILE_MODS', false);