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In this screencast we go through the different parts of a WordPress installation and look at how to clean things up, which files and plug-ins are safe to remove from the server, where to look, and so on. Running a tight ship is a key part of good security, and removing unused files and plug-ins eliminates potential attack vectors and helps keep your site clean and organized. There are three main areas where we want to clean things up: files and folders, unused or outdated plug-ins, and unused or outdated themes. The first place to check is the Plugins page.
Here in the WordPress Admin, click on the Plugins link to go there. We want to take a good look through our installed plug-ins and see if there are any that we don't need, are no longer supported, or have become obsolete. For example, here is the ubiquitous Hello Dolly plug-in, which is fun but not needed, so we could remove it to keep things clean and focused. To do so, we would simply click on the Delete button, or we could do it manually from the server.
We also want to check our installed themes and see if there is anything that doesn't need to be there. It's okay to keep inactive themes, such as these three. It doesn't hurt anything to do so, but whenever possible go ahead and eliminate anything that you don't need. For example, the Skulls theme was used for a demonstration in a previous screencast, and it is no longer needed. So to keep things clean and tidy, we would go ahead and click the Delete button to remove it as well.
After cleaning up the Admin area of unused plug-ins and themes, we take a look at the core files by visiting our FTP/file editor. Here is a view of the root directory of our WordPress installation where we see several files that are included with WordPress but not needed. These files may be safely removed. The wp-config-sample.php file is not needed after installing WordPress, readme.html contains the WordPress version number and should be deleted, and of course there's license.txt--it's your call.
I usually delete it. In addition to these files, check for any non-WordPress directories, files, scripts, images, and so forth, that are not needed. As you go through your files, you may want to archive any removed content. For each of my sites I like to keep an offline folder where I keep notes, unused code, and development files. That keeps the junk off the server but still available if needed. In this screencast, we've cleaned up our plug-ins, themes, and core files for better organization and easier-to-manage site security.
Of course good housekeeping is an important part of any comprehensive WordPress security strategy.
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