Are you seeing a 503 service unavailable error in WordPress? The problem with the 503 error is that it gives no clues about what’s causing it which makes it extremely frustrating for beginners. In this article, we will show you how to fix the 503 service unavailable error in WordPress. What Causes 503 Service Unavailable Read More
Category: CentOS
How to Update WordPress to 6 Manually.
Summa’s notes 1, You may need to stop the httpd service first if you are using a non-hosting platform. For example, I am using Centos Stream, to stop the web service, systemctl stop httpd.service When the update is finished, to start the httpd service, systemctl start httpd.service 2, I skipped the steps for deactivating and Read More
How to Fix “Failed to download metadata for repo AppStream” on CentOS 8
Updated on February 10, 2022 I installed a minimalist CentOS 8 on one of my servers. Installation went successful, however, when I tried to update the system using yum update I see this error message: Failed to download metadata for repo. Below is the complete error. [root@autocontroller ~]# yum update CentOS-8 – AppStream 70 B/s | 38 Read More
How to Migrate from CentOS 8 to CentOS Stream
Author: Vivek Gite Step 1 – Backup Like every seasoned developer and sysadmin, I backed up all my project files, MySQL database and config files. So if something goes wrong, I should be able to go back quickly. That is all. Hence, keep verified backups. I have following software installed: ELEP repo enabled for CentOS 8 Read More
How To Fix a Missing Content-Security-Policy on a Website
by: Kent Ickler Content-Security-Policy-What-What? Content-Security-Policy is a security header that can (and should) be included on communication from your website’s server to a client. When a user goes to your website, headers are used for the client and server to exchange information about the browsing session. This is typically all done in the background unbeknownst Read More
How to Send Mails From Command Line in Linux (Postfix)
In this tutorial, we shall be using an enhanced version of the mail command. It’s called mailx (or just mail when installed), and it can do many more things than what the older mail command from gnu mailutils package can do. How does it work The mail/mailx command needs a local smtp server (MTA) running Read More