Luke Reynolds 
The purpose of this tutorial is to show how to fix the RHEL7 User Not In Sudoers File Error on all major Linux distributions. When trying to execute Linux commands with root privileges via the sudo command, you will receive an error message if the current user is not in the sudoers file. This is a security feature on Linux systems to stop ordinary users from esclating their commands to administrator privileges.
The purpose of this tutorial is to enable auto login on GNOME GUI and the KDE Plasma desktop environment on CentOS Linux system. If you are using CentOS and getting tired of needing to provide your password every time your computer boots up, or goes back to the lock screen, then enabling auto login will save you some time and frustration.
The iptables firewall on Linux systems is a very useful feature that allows system administrators to control, with granular precision, what network traffic is permitted or denied to the system.
Git has become the default version control system for much of the open source world. While Git hosting services like Github and Bitbucket are good and work well, they leave you dependent on those services for everything, including crucial factors like uptime and security. Aside from that, neither of those services are open source. Thankfully, an alternative exists in the form of Gitlab.
The purpose of this tutorial is to show how to remove iptables rules on a Linux system. It is possible to remove iptables rules one at a time or to clear all of the rules in any iptables chain at once. You will soon see how.
Logical Volume Manager (LVM) is used on Linux to manage hard drives and other storage devices. As the name implies, it can sort raw storage into logical volumes, making it easy to configure and use.
Are you receiving a exit code 127 error when trying to execute a Bash script? In this tutorial, we’ll explain what causes this “command not found” error and show you how to fix it.
A LAMP stack is an assortment of software that contains everything you need in order to serve a website, show dynamic content, and store or retrieve data from a database. The software is all within the LAMP acronym, namely the Linux operating system, Apache web server, MySQL database (or MariaDB alternatively), and PHP programming language.
The purpose of this tutorial is to provide you with some information on how to improve Ubuntu’s repository download speed by selecting the closest, that is, possibly fastest mirror relative to your geographical location.
The purpose of this tutorial is to enable root login over SSH on Ubuntu 20.04 Focal Fossa Linux. After installing OpenSSH, logging into the root account is disabled by default. This is done for security purposes. In case an account is compromised, it means the attacker will not automatically have root permissions as well.
