Objective

This article explains a system upgrade procedure from Debian 8 Jessie Linux to Debian 9 Stretch.

What's New

Apart from the up to date Linux kernel, Stretch comes with a considerable amount of new and updated software as well as a number of packages had been rendered obsolete:

This new release of Debian again comes with a lot more software than its predecessor jessie; the distribution includes over 15346 new packages, for a total of over 51687 packages. Most of the software in the distribution has been updated: over 29859 software packages (this is 57% of all packages in jessie). Also, a significant number of packages (over 6739, 13% of the packages in jessie) have for various reasons been removed from the distribution.
SOURCE: debian.org

Objective

The following article provides you with a simple to follow procedure on how to install video chat and voice call application Skype on Debian 9 Stretch.

Requirements

Privileged access to your Debian 9 Stretch Linux system is required.

Difficulty

EASY

Conventions

Introduction

The following text will describe a configuration procedure of LEMP server on Debian 9 Stretch Linux. The LEMP stack described by the below guide will consist of:
  • Debian 9 Stretch Linux
  • Nginx Web server
  • MariaDB or MySQL relational database
  • PHP 7 scripting language
Please be aware that our main objective is to configure bare bones LEMP stack on Debian 9 Stretch Linux. From this reason, no security hardening or performance fine-tuning recommendations are included in the article.

Once you have your bare bones, LEMP stack configured, consider a further hardening of your server based on the target deployment environment.

Conventions

Introduction

The upgrade from Raspbian Jessie to Raspbian 9 Stretch is a relatively simple procedure. However, exercise caution, as there is always a chance to break the entire system. The fewer installed 3rd-party packages and services, the more likely you are able successfully to upgrade your Raspbian Linux system. apt-get update

Recommendations

  • Remove unnecessary or obsolete packages
  • Make a data and configuration backup
  • Perform an upgrade directly using console
  • Installed 3rd-party software on Raspbian Stretch 9

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