The Ubuntu 20.04 GPG error: The following signatures couldn't be verified is a most common error when attempting to include third party package repositories to the apt package manager.

The GPG error should rather be treated as a warning against potential package installation from unknown sources. Therefore, the GPG error message prompts the user to verify and manually import the third party signature belonging to relevant package developer.

In this tutorial you will learn:
  • How to import public key signature

In this tutorial you will learn how to reset your GNOME Desktop Settings to Factory Default on Ubuntu 20.04 Focal Fossa. The reset will put your desktop appearance and all settings, shortcuts, wallpapers and etc. to the factory default.

In this tutorial you will learn:
  • How to Reset GNOME Desktop Settings to Factory Default

In this tutorial you will learn how to install the make command on Ubuntu 20.04 Focal Fossa.

In this tutorial you will learn:
  • How to install make command
  • How to troubleshoot the Command 'make' not found error

In this tutorial you will learn how to permanently add a static route on Ubuntu 20.04 Focal Fossa Linux using netplan.

In this tutorial you will learn:
  • How to add permanent static route
  • How to apply new netplan configuration
  • How to check static routes from command line

In this tutorial you will learn how to install AnyDesk application on Ubuntu 20.04 Focal Fossa.

In this tutorial you will learn:
  • How to installed AnyDesk
  • How to share desktop remotely
  • How to to connect to AnyDesk remote desktop

In this tutorial you will learn how to change the default Ubuntu 20.04 Desktop to macOS theme. Although in this tutorial we will perform the installation of macOS Mojave theme the steps bellow should be applicable to perform the installation of any other macOS style theme.

In this tutorial you will learn:
  • How to install macOS theme
  • How to install macOS icons
  • How to install macOS cursor theme
  • How to install macOS style bottom panel
  • How to set macOS Mojave wallpaper
  • How to start automaticaly macOS panel after reboot

The objective of this tutorial is to hibernate ( suspend to disk ) the Ubuntu 20.04 Focal Fossa Linux Desktop.

In this tutorial you will learn:

The objective of this guide is to install the Atom editor on Ubuntu 20.04 Focal Fossa Linux.

In this tutorial you will learn:
  • How to install Atom
  • How to start Atom
  • How to update Atom

The objective of this guide is to install AWS CLI on Ubuntu 20.04 Focal Fossa Linux. In particular, this article will describe a procedure of installing AWS CLI on Ubuntu 20.04 from a standard Ubuntu repository using the apt command.

In this tutorial you will learn:
  • How to install AWS CLI on Ubuntu 20.04

In this tutorial you will learn how to set / change server's Fully Qualified Domain Name (FQDN) on Ubuntu 20.04 Focal Fossa Linux server or desktop.

In this tutorial you will learn:
  • How to change or set FQDN via /etc/hosts

Kotlin is a general-purpose programming language which interoperates fully with Java. Kotlin's JVM version of its standard library depends on the Java Class Library, hence this tutorial will first show the reader how to install Java SDK and then a Kotlin compiler on Ubuntu 20.04.

In this tutorial you will learn:
  • How to install Java SDK
  • How to install Kotlin compiler
  • How to compile simple Kotlin program
  • How to run Kotlin program

This article will provide you with a list of LatTeX editors and their installation instructions on Ubuntu 20.04 Focal Fossa Linux.

In this tutorial you will learn:
  • How to install gedit latex plugin
  • How to install LyX latex editor and compiler
  • How to install LaTeXila latex editor and compiler
  • How to install Kile latex editor and compiler
  • How to install TeXstudio latex editor and compiler
  • How to install Texmaker latex editor and compiler
  • How to install Gummi latex editor and compiler

In this tutorial you will learn how to install Android Studio the IDE for Android development on Ubuntu 20.04 Focal Fossa Linux.

In this tutorial you will learn:
  • How to install Android Studio
  • How to start Android Studio

This tutorial will provide the reader with some native and alternative methods on how to suspend ( suspend to RAM ) Ubuntu 20.04 Focal Fossa Linux Desktop.

In this tutorial you will learn:
  • How to suspend system
  • Suspend from Activities
  • How to suspend the system from command line

The objective of this tutorial is to show the reader how to disable an automatic screen lock on Ubuntu 20.04 Focal Fossa Linux GNOME desktop.

In this tutorial you will learn:
  • How to Disable / Turn Off the automated Lock Screen
  • How to Disable / Turn Off Lock Screen on Suspend
  • How to Disable / Turn Off Lock Screen Notifications

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