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      How to Fix the “Upload: Failed to Write File to Disk” Error in WordPress (3 Ways)


      Are you encountering the “Upload: Failed to write file to disk” error message when uploading files in WordPress? Whether you’re trying to add images or videos to your site, this message can be very frustrating, as it prevents you from sharing your amazing visuals with your audience.

      Fortunately, you can troubleshoot this issue by following a few simple steps. In some cases, you’ll just need to contact your web host to get it fixed.

      In this post, we’ll take a closer look at the “Upload: Failed to write file to disk” error and its main causes. We’ll then show you three simple ways to fix this problem. Let’s get started!

      What Causes the “Upload: Failed to Write File to Disk” Error in WordPress

      The “Upload: Failed to Write File to Disk” error message typically comes up when you’re trying to upload media files to your WordPress site. There are a few possible causes, the most common one being incorrect file permissions.

      Every file and folder on your WordPress site comes with a set of permissions. These are controlled by the web server and determine which site users can access and edit your files and folders. Thus, if the permissions are incorrect, you may be unable to perform certain actions on your site, such as uploading images to your media library.

      However, this error could also be caused by other issues, including a full WordPress temporary folder. It’s also possible that you’ve reached the disk space limit provided with your hosting plan.

      Next, we’ll take a closer look at these possible causes. We’ll also walk you through a solution for each scenario.

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      Avoid troubleshooting when you sign up for DreamPress. Our friendly WordPress experts are available 24/7 to help solve website problems — big or small.

      How to Fix the “Upload: Failed to Write File to Disk” Error in WordPress (3 Ways)

      Now, let’s look at three easy ways to fix this disk error in WordPress. As always, we recommend that you perform a backup of your site before proceeding. That way, if something goes wrong, you can restore your site to an earlier version.

      1. Change the File Permissions

      As we mentioned earlier, the “Upload: Failed to write file to disk” error is likely caused by incorrect file permissions. If you want to check these permissions, you can contact your hosting provider and ask them if they can do it for you. Alternatively, you can do this yourself by accessing your site’s root directory.

      First, you’ll need to connect to your site via a Secure File Transfer Protocol (SFTP) client such as FileZilla. You can also access your site’s directory through the file manager in your hosting account.

      If you have a DreamHost account, start by navigating to Websites > Files in the sidebar. Then locate your domain and click on the Manage Files button.

      Accessing your site in DreamHost

      This will take you to the file manager. To access your site’s directory, you can open the folder labeled with your domain name. Inside, locate the wp-content folder and right-click on it.

      Next, select File permissions.

      Locating the wp-content folder in your site’s root directory.

      In the pop-up window, go to the Numeric value field and enter “755” or “750” in the corresponding box. Next, you can select the Recurse into subdirectories and Apply to directories only options and click on OK.

      Changing the file permissions of your subdirectories in FileZilla.

      You have now set the correct file permissions for all subdirectories inside the wp-content folder. This includes the uploads folder, which is where your uploaded media files are stored.

      However, you’ll also need to set the correct permissions for the files within those folders. To do this, you can right-click on the wp-content folder again and select File permissions.

      In the Numeric value field, type in “644”. Then select the Recurse into subdirectories and Apply to files only options, and click on OK.

      Changing the file permissions of your files in FileZilla.

      Don’t worry if you’re still unable to upload files to your site after checking your file permissions. There are a couple of other things you can do to resolve the issue.

      2. Empty the WordPress Temporary Folder

      If changing the file permissions doesn’t solve the problem, you may need to empty your temporary folder. WordPress processes your media uploads in PHP. This means that your images are first saved in a temporary folder on your web server before being transferred to your uploads folder.

      If the temporary folder is full, WordPress won’t be able to write your files to disk until you’ve emptied it. Unfortunately, you cannot access this temporary directory via SFTP.  However, you can simply contact your hosting provider and ask them to empty the folder for you, and then check to see if the error has been resolved. If you have sudo users, you could ask them to clear your temporary folder.

      Alternatively, you can try to resolve this issue by defining a new location for WordPress to store your media (instead of the temporary folder). First, you’ll need to connect to your site via an SFTP client or the file manager. Then locate the wp-config.php file, right-click on it, and select View/Edit.

      Editing the wp-config.php file in FileZilla.

      Next, you’ll need to paste in the following code right before the line that reads “That’s all, stop editing! Happy publishing”:

      define(‘WP_TEMP_DIR’, dirname(__FILE__) . ‘/wp-content/temp/’);

      Save your changes, then navigate to the wp-content folder, open it, and create a new folder inside it called temp.

      Creating a temp folder inside the wp-content folder.

      When you’re done, you can return to your website and try to upload an image. If the file disk error was caused by the temporary folder, the issue should now be resolved.

      3. Upgrade Your Hosting Plan

      The disk error could also be a sign that you’ve outgrown your current hosting plan. For example, if you’ve been adding a lot of content to your site, including media files, new pages, and plugins, you might have used up all the disk space available in your account.

      Your web host may be able to tell you how much disk space you have left. If you’re a DreamHost client, you can check your disk usage by logging into your hosting account and navigating to Billing & Account > Disk Usage in the side menu.

      Checking your disk usage in your DreamHost account.

      If you’ve reached your disk space limit, you might need to upgrade to a more advanced hosting plan. This will give your site more room to grow. We recommend getting in touch with your hosting provider to discuss the possibility of switching to a higher plan.

      Additional WordPress Error Articles

      Do you want to learn how to resolve other technical issues on your site? We’ve put together several tutorials to help you troubleshoot the most common WordPress errors:

      If you’re looking for more information about running a WordPress site, make sure to check out our WordPress Tutorials. This is a collection of guides designed to help you navigate the WordPress dashboard like an expert.

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      Fix the “Upload: Failed to Write File to Disk” Error

      The “Upload: Failed to write file to disk” error message prevents you from uploading files such as images and videos to your WordPress site. Incorrect file permissions on your site normally cause this error. However, you may also be seeing this message because you’ve used all the disk space offered with your hosting plan.

      In this article, we looked at three simple ways to fix this common WordPress error:

      1. Change the file permissions of your WordPress site using an SFTP client like FileZilla.
      2. Empty the WordPress temporary folder by getting in touch with your web host.
      3. Upgrade your hosting plan to access more disk space.

      At DreamHost, we provide 24/7 expert support to help you efficiently resolve technical issues. We also offer reliable managed WordPress hosting solutions to help you grow your business while also making it easy for you to upgrade to an advanced plan as your site grows.



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      Apache Configuration Error AH02572: Failed to configure at least one certificate and key



      Part of the Series:
      Common Apache Errors

      This tutorial series explains how to troubleshoot and fix some of the most common errors that you may encounter when using the Apache web server.

      Each tutorial in this series includes descriptions of common Apache configuration, network, filesystem, or permission errors. The series begins with an overview of the commands and log files that you can use to troubleshoot Apache. Subsequent tutorials examine specific errors in detail.

      Introduction

      Apache generates an AH02572: Failed to configure at least one certificate and key error message when it is configured to use the ssl module, but is missing a TLS/SSL public certificate and corresponding private key. The error will prevent Apache from starting up, and the error message itself will be found in Apache’s logs.

      In this tutorial you will learn how to troubleshoot an AH02572 error using the methods described in the How to Troubleshoot Common Apache Errors tutorial at the beginning of this series. You will also learn how to set the SSLCertificateFile and SSLCertificateKeyFile directives to resolve the message.

      If you have already determined that your Apache server is affected by an AH02572 error and you would like to skip the troubleshooting steps, the Adding an SSL Certificate to Apache section at the end of this tutorial explains how to resolve the error.

      Troubleshooting Using systemctl

      When you are troubleshooting an AH02572: Failed to configure at least one certificate and key error message, Apache will not be running. Its systemctl status will show a failed message.

      To examine Apache’s status with systemctl, run the following command on Ubuntu and Debian derived Linux distributions:

      Ubuntu and Debian Systems

      • sudo systemctl status apache2.service -l --no-pager

      On CentOS and Fedora systems, use this command to examine Apache’s status:

      CentOS and Fedora Systems

      • sudo systemctl status httpd.service -l --no-pager

      The -l flag will ensure that systemctl outputs the entire contents of a line, instead of substituting in ellipses () for long lines. The --no-pager flag will output the entire log to your screen without invoking a tool like less that only shows a screen of content at a time.

      You should receive output that is similar to the following:

      Output

      ● apache2.service - The Apache HTTP Server Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset: enabled) Drop-In: /lib/systemd/system/apache2.service.d └─apache2-systemd.conf Active: failed (Result: exit-code) since Fri 2020-07-31 16:02:41 UTC; 20s ago Process: 36 ExecStart=/usr/sbin/apachectl start (code=exited, status=1/FAILURE) Jul 31 16:02:41 7d6ef84b6907 systemd[1]: Starting The Apache HTTP Server... Jul 31 16:02:41 7d6ef84b6907 apachectl[36]: Action 'start' failed. Jul 31 16:02:41 7d6ef84b6907 apachectl[36]: The Apache error log may have more information. Jul 31 16:02:41 7d6ef84b6907 systemd[1]: apache2.service: Control process exited, code=exited status=1 Jul 31 16:02:41 7d6ef84b6907 systemd[1]: apache2.service: Failed with result 'exit-code'. Jul 31 16:02:41 7d6ef84b6907 systemd[1]: Failed to start The Apache HTTP Server.

      The important lines to note are the ones showing that Apache failed to start. However, there is nothing in the output that indicates an AH02572 error message. Examining the systemd logs for Apache using the journalctl command, or checking Apache’s configuration files with apachectl configtest will not help locate information that you can use to troubleshoot the error.

      To diagnose and resolve an AH02572 error, the next section explains how to examine Apache’s logs directly.

      Examining Apache’s Logs

      Apache logs diagnostic information about its internal operations to various locations, which differ depending on your Linux distribution. Typically, Apache is configured to log error messages to a separate log file from access requests in order to help with debugging, monitoring, and alerting.

      On Ubuntu and Debian-derived systems, Apache defaults to using /var/log/apache2/error.log for error messages.

      On CentOS, Fedora, and RedHat-derived systems, Apache defaults to logging errors to the /var/log/httpd/error_log file.

      To examine Apache’s logs for evidence of an AH02572 error message, use the grep utility to search for the error code in the appropriate log file for your distribution. While there are other tools like less that you could use to find evidence of an AH02572 error, grep will only display lines with the error code so you can be sure of whether you’re affected by the issue.

      Invoke grep like this on Ubuntu and Debian-derived systems:

      • sudo grep AH02572 /var/log/apache2/error.log

      On CentOS, Fedora, and RedHat-derived systems, use the following command:

      • sudo grep AH02572 /var/log/httpd/error_log

      If your Apache server is affected by an AH02572 error, you will have output like the following:

      Output

      [Mon Aug 03 13:21:47.677235 2020] [ssl:emerg] [pid 26:tid 140355819735360] AH02572: Failed to configure at least one certificate and key for 172.17.0.5:443

      If your server is affected by an AH02572 error, the next section of this tutorial explains how to resolve it, by either disabling the ssl module, or configuring Apache with a private key and public certificate file.

      Resolving an AH02572 Error

      There are three ways to resolve an AH02572 error. The first option to resolve the error is to configure Apache with a private key and public certificate that is signed by a recognized Certificate Authority (CA). Let’s Encrypt is a free CA and you can use it to issue a valid certificate. This approach will ensure that traffic to and from your server is encrypted properly, and that web browsers and other HTTP clients trust your Apache server.

      Another approach is to create a self-signed certificate for your Apache server. This approach is useful for development and testing environments, or in cases where your server is not directly connected to the Internet and you can establish trust between systems manually.

      The last approach to resolving an AH02572 error is to turn off Apache’s ssl module entirely. This option is the least preferred since traffic to and from your server will not be encrypted. However, if you are only using your Apache server for local development or in a trusted environment, this approach can be valid.

      The following sections explain how to resolve an AH02572 error using each of the three options.

      Resolving an AH02572 Error with a Let’s Encrypt TLS Certificate

      To encrypt traffic to your Apache server using a free Let’s Encrypt TLS Certificate, use one of the guides that is specific to your Linux distribution from this tutorial series: How To Secure Apache with Let’s Encrypt.

      The Let’s Encrypt process is mostly automated, and the scripts will configure Apache for you. Moreover, the issued certificate will also be renewed automatically so you do not have to worry about it expiring in the future.

      If you are using a Linux distribution that is not included in the How To Secure Apache with Let’s Encrypt series, the Let’s Encrypt documentation includes links to interactive Certbot instructions that can help you configure your Apache server with a valid TLS certificate.

      Resolving an AH02572 Error with a Self-Signed Certificate

      To encrypt traffic to your Apache server using a self-signed certificate, use one of the tutorials from this series that explains how to create Self-signed SSL Certificates with Apache.

      These tutorials demonstrate how to generate a private key and public certificate for your Apache server. They also demonstrate how to use the SSLCertificateFile and SSLCertificateKeyFile Apache directives to configure your server with the certificate that you generate.

      If you are not using a distribution that is listed in the Self-signed SSL Certificates with Apache set of tutorials, this OpenSSL Essentials: Working with SSL Certificates, Private Keys and CSRs guide can help you create a private key and self-signed public certificate that you can use with Apache.

      Note: Where possible, it is best to use a free Let’s Encrypt certificate, or other commercially issued TLS certificate. Self-signed TLS certificates are not trusted by default by browsers and other HTTP clients. As a result, your users will see a security error when visiting your site. However, if you are doing local development, or your use case does not require a valid TLS certificate you can opt for the self-signed approach.

      Disabling the ssl Module

      The last approach to resolving an AH02572 error is to turn off Apache’s TLS/SSL support by disabling the ssl module. This approach is less desirable than encrypting traffic to your server with a TLS certificate, so be certain that you do not need TLS support before disabling the module.

      To disable Apache’s ssl module on Ubuntu and Debian-derived systems, run the following command:

      On CentOS, Fedora, and RedHat-derived systems, disable the module with the following command:

      • sudo rm /etc/httpd/conf.modules.d/00-ssl.conf

      Once you have disabled the ssl module, run apachectl to test that the configuration is valid.

      • sudo apachectl configtest

      A successful apachectl configtest invocation should result in output like this:

      Output

      Syntax OK

      You can now restart Apache using the appropriate systemctl restart command for your Linux distribution.

      On Ubuntu and Debian-derived systems, run the following:

      • sudo systemctl restart apache2.service

      On CentOS, Fedora, and RedHat-derived systems use this command to restart Apache:

      • sudo systemctl restart httpd.service

      If there are no errors from the systemctl command then you have disabled the ssl module successfully.

      Conclusion

      AH02572: Failed to configure at least one certificate and key errors are challenging to detect and troubleshoot. They cannot be diagnosed with the usual systemctl, journalctl, and apachectl commands. In this tutorial you learned how to use the grep utility to examine Apache’s logs directly for evidence of an AH02572 error.

      Next you learned how to use Let’s Encrypt to configure Apache with a TLS certificate to secure your traffic and resolve the AH02572 error. You also learned about using self-signed TLS certificates for development and isolated environments. Finally you learned how to turn off the ssl module for those situations where it is not needed.



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