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How to Install Xen Hypervisor on Debian 9 “Stretch” and Debian 8 “Jessie” Linux Systems

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In this article, we will discuss the installation of Xen hypervisor server on Linux systems (Debian Family “Debian 9 “Stretch” and Debian 8 “Jessie” /Ubuntu 14.04, and higher”). The following steps worked on Debian 9 “stretch” and the result was installing xen 4.8 on Debian 9. For Debian 8 “Jessie”Read More

Howto remove/resolve Openvpn message “KEY_CONFIG pointing to the wrong version of openssl.cnf” on Linux Systems

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In this mini post I’ll show you how to  solve this Openvpn error message “KEY_CONFIG pointing to the wrong version of openssl.cnf” which may appears when you try to Generate Keys and Certificates which needed in the installation process of OpenVPN server on Debian 9 “stretch” Linux systems. You canRead More

How to Move/Migrate a Full Git Repository From GitHub to GitLab Self-Hosted Instance

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In this post, I’ll show you how to move a full git repository from GitHub to GitLab self-hosted instance. We’ve an old repository existing on github and we wanted to move it with all branches and commits to our gitlab stand alone server, so Here’s the steps we did: StepRead More

How to Install Gnome GUI on CentOS 7 / RHEL 7 Linux Systems

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Linux admins spend most of their time on working in a terminal; there are some who like to work on GUI instead of a terminal. By default, CentOS 7 installed as the minimal server, and user intervention is required to change the installation type. This guide will help you toRead More

How to Copy/Move Docker Images and Export/Import Docker Containers between hosts

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In this post, we’ll show you how to copy/move a docker image between hosts and import/export a docker container between hosts. You may need to do this move images/containers between dev team to save time downloading Docker image from your private repository or save time consumed in adding your configurationRead More

HTTP response status codes with a simple explanation

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In this post, we’ll show you the different types of HTTP status code. HTTP response status codes indicate whether a specific HTTP request has been successfully completed. Responses are grouped in five classes: informational responses, successful responses, redirects, client errors, and servers errors. Status codes are defined by section 10Read More

Install openvpn server on Debian 9 “Stretch” Linux systems

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In this article we will discuss the installation of Openvpn server on Linux systems (Debian Family “Debian 9 “Stretch”/Ubuntu 16.04, and higher”). VPN, or virtual private network, is a secure method of connecting remote internet resources together as if they were under the same LAN. OpenVPN is a tool forRead More

Howto remove/resolve git message “Commit your changes or stash them before you can merge” on Linux Systems

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In this mini post I’ll show you how to  solve this git error message “Commit your changes or stash them before you can merge” which appears when you try to pull the latest code from your git repository and did some “not committed” modifications to your code/repository on your localRead More

Howto reset AUTO_INCREMENT from a table in MySQL/MariaDB Databases

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In this post, I’ll show you how to reset the auto_increment field from a table in MySQL/MariaDB databases. Sometimes you need to drop all the data in an existing table and reset the auto_increment to start from 1. This post is dealing with only resetting the auto_increment to 1. ToRead More

Howto delete a column from a table in MySQL/MariaDB Databases

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In this post, I’ll show you how to drop a column from a table in MySQL/MariaDB databases. Sometimes you need to drop a wrongly created column in your table, or sometimes when you deploy a rails application and there is a database migration, if the deploy fail for any reasonRead More