Linux Howto’s for System Administrations
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Applying updates regularly should be the top priority in the day-to-day tasks of a System administrator. Running unpatched systems for a long time is quite risky. There are many ways …
As you may already know, it was not possible to migrate between major version of RHEL-derivatives. Meaning – you can’t directly upgrade from CentOS 7.x to CentOS 8.x version. The …
The scope of this tutorial is to explain how we can edit and make changes to Network Configurations on RHEL/CentOS 8/7 from the command line only, and, more specifically how …
A Virtual Private Network is a technology solution used to provide privacy and security for inter-network connections. The most well-known case consists of people connecting to a remote server with …
Continuing the previous tutorial on How to Secure and Harden CentOS server, in this article, we’ll discuss other security tips that will be presented on the below checklist. Requirements 20 …
This tutorial only covers general security tips for CentOS 8/7 which can be used to harden the system. The checklist tips are intended to be used mostly on various types …
How do I enable FirewallD logging for denied packets on Linux operating systems so that I can view all dropped packets information? How can I view a log of the …
As you probably know, Netstat (network statistics) is a command line tool that can be used to check the network configuration and activity. The netcat command is not available in …
A while ago, I was trying to configure Apache server to listen to a different port other than its default port i.e 80. After I made the necessary changes in …
PHP is a popular, free and opensource scripting language used mainly for web development. At the moment the current version of PHP (at the time of writing this tutorial) is …