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Top 6 Best, Free PDF Readers in Ubuntu / Debian Linux

This article covers the best PDF Viewers you can install on your Ubuntu / Debian Linux system. 

PDF viewer list on Ubuntu 20.04 Focal Fossa Linux:

  • Evince PDF Viewer.
  • Okular PDF Viewer.
  • Atril PDF Viewer.
  • Adobe Reader PDF Viewer.
  • Zathura PDF viewer.
  • GNU gv PDF Viewer.


Okular is a default PDF viewer on Ubuntu 20.04 KDE Plasma Desktop. To install Okular PDF Viewer, simply run the command:

$ sudo apt install okular

Install Discord on Linux (Debian, Ubuntu, Linux Mint) - Step by Step Process ?

This article covers the installation procedure of Discord on any Linux Distribution such as Linux Mint 20, Ubuntu 20.04, and Debian 10. Also, we explained a quick method of uninstalling this Discord platform from your Linux system.

You can either uninstall it from the software center or use this command in the terminal:

$ sudo apt remove discord


If you have enabled Snap support on your Linux distribution, you can use the following command to install it:

$ sudo snap install discord

If you want to remove it, you can use the snap command to uninstall it:

$ sudo snap remove discord

Install Terminalizer on Linux Mint 20 - Step by Step Process ?

This article covers how to install Terminalizer which is a terminal recording tool on a Linux distribution of your choice, you will be able to conveniently record all your terminal-related activities. 

Terminalizer is a fancy and highly customizable CLI tool that records and renders terminal activity and can make an animated GIF image from it. 

It can work well on Ubuntu, CentOS, Arch Linux, SUSE, RedHat, Fedora, and so on.


How to perform the Installation of terminalizer on Linux systems ?

To install the terminalizer, run the following command:

$ sudo npm install -g terminalizer

In the higher version of Node.js, there might be a failure of installation. In such a case, let's install the developer tools to compile the C++ add-ons.

$ sudo apt install build-essential

To verify the installation of development tools, run the following command:

$ gcc -v
$ make -v


How to use the terminalizer ?

To use terminalizer, First run the test file in the current directory with the following command:

$ terminalizer record test

You can run some commands then press ctrl+D to save the recording as a YAML file (test.yml). 

Now, you can play the recording by running the below command that shows all the history of the command running on that session:

$ terminalizer play test


How to Create animated Gif ?

You can create a animated Gif of the terminal session with the following command:

$ sudo terminalizer render test

Here, we are trying to create a animated Gif for our terminal session with file name test.yml.

You will get the animated gif with the program default settings for our terminal session of the test file.


To install Node.js on Ubuntu:

1. update your system.

$ apt update

2. Next, run the command below to install Node.js from the repositories.

$ apt install node.js

3. Upon successful installation of node.js, you can verify the version of Node.js using the command as shown.

$ nodejs --version

Install Redshift on Linux Mint - Step by Step Process ?

This article covers the procedure of installing Redshift- the color temperature adjusting tool on a Linux system.

Also, we have shared with you the procedure of uninstalling this tool from your system if you do not want to use it any longer.

Redshift is a tool that is used to adjust the color temperature of your screen according to your surroundings.

The color temperature adapts to the time of the day. 

A different color temperature is set for the night and daytime. It applies a red hue or redness effect to your screen or graphical display. 

This helps reduce eye strain and lessen the risk of delayed sleep in case you are working in front of the screen at night. 


How does RedShift work?

In the early morning, redshift allows your eyes to gradually adapt over a period of about an hour, as the temperature transitions smoothly from night time until the day. 

The color temperature during the day should match the light from outside, typically around 5500K-6500K. The default daytime temperature is 6500K.

At night the color temperature is set to match the lamps in the room. 

This temperature is around 3000K-4000K. The default night temperature is 4500K.


To install RedShift on Ubuntu:

1. The most straightforward of installing redshift on Ubuntu 20.04 is using the apt package manager. To install Redshift, execute the following commands:

$ sudo apt update
$ sudo apt install redshift redshift-gtk

Install Slack on Ubuntu 20.04 - Step by Step Process ?

This article covers the different methods of installation of Slack on the Ubuntu 20.04 system in detail.
Slack is a well-known and modern communication tool used to organize various communications in channels so that teams can work together and communicate when needed.

Slack Installation on Ubuntu using Snap package:
1. Install snapd package in your system. write the appended command, and then hit enter.

$ sudo apt install snapd

2. If the latest apt is not installed in your system then try using apt-get update && apt-get upgrade to get all of the available updates.
3. You can install the slack by using affixed command. You need to type this command on the terminal then press enter.

$ sudo snap install slack --classic

Steps to Install Microsoft Teams on Ubuntu 20.04 LTS ?

This article will guide you on the steps to #install #Microsoft #Teams on #Ubuntu 20.04 LTS system using either the command line or graphical method. You can get more information about how to get started with Microsoft Teams, visit the Microsoft Teams Documentation https://docs.microsoft.com/en-us/microsoftteams/get-started-with-teams-quick-start page. Microsoft has spent time ensuring Microsoft Teams has feature parity with Skype for Business Online. Microsoft Teams has the same voice, video and chat capabilities, but goes beyond the basics by offering more effective group conversations and social networking-esque features that drive engagement. To Install Teams via DEB Linux Binary Installer: 1. Download Teams Linux Binary Installer. 2. Navigate to teams app downloads page and grab the #Debian binary #installer. 3. Install Teams Using DEB Binary Installer. 4. Once the download is complete, install Teams using APT package manager. 5. Install Microsoft Teams from Microsoft #Repository.