ERROR: sudo: pam_open_session: System error sudo: policy plugin failed session initialization

I got this error when trying to run a few commads with sudo right after I set password expiration on my RHEL7 box. Immediately after, I couldn’t use sudo for…

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How to Install Premium SSL on Hostname in CWP on Apache

Sometimes, you may choose to install premium SSL such as Comodo Positive SSL or Rapid SSL on your hostname instead of the free Let’s Encrypt SSL provided by CWP. Below…

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How to integrate Collabora Online on a Nextcloud server

One of the use cases of a Nextcloud server is that it can be used as a collaboration and sharing tool. Our current Nextcloud setup allows document sharing and collaborative…

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How to install Nextcloud 16.0.4 on Ubuntu 16.04

Nextcloud is an open source software that allows users to store their data; files, contacts, calendars, news feed, TO-DO lists and much more. It is a tool for collaboration and…

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Bareos Backup Server

A backup server enables one to backup data, files, applications and databases either locally or remotely. It can be a combination of software and hardware technologies that provide storage and…

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How to create a local domain for XAMPP in Centos 7/RHEL 7

Instead of using the local domain localhost for your local development environment, you may create a custom domain name, named anything else and use it instead. In this example, we…

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The Linux Boot Process

Here, we are seeking to understand what exactly happens when a Linux machine is powered on. Depending on your hardware configuration, the firmware that is responsible for system startup will…

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Determining and Configuring Hardware Settings

When setting up a PC to have Linux installed, one needs to familiarize themselves with the devices installed on their system and how they are configured. Some of these items…

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