Archives For Howtos

Vivaldi web browser 3.3 was released today. The new release introduces a new Break Mode.

By clicking on the new pause button at the left corner of the Status Bar, or press Ctrl + “.” on keyboard, Break Mode mutes and stops HTML5 audio and videos, hides all tabs, panels, and other content leaving the screen clean.

After taking a break, you can resume your browsing activity exactly where you left off by pressing Play to un-pause the browser.

Other changes in Vivaldi 3.3 include:

  • New Private Window Themes
  • Base domain highlighting for improved security
  • Easier cropping of URL in the Address Bar by pressing Ctrl & clicking.
  • Full-page blocking support
  • Drag & drop Speed Dials to folders

How to Install Vivaldi 3.3 in Ubuntu:

The official Ubuntu .DEB packages are available for download at the link below:

Download Vivaldi (DEB)

Grab the deb matches your OS, then install it via Ubuntu Software or Gdebi package manager. Or run command in terminal:

sudo dpkg -i ~/Downloads/vivaldi-stable_3.3*.deb

Vivaldi also has apt repository, with it you can install the browser and get future updates through Software Updater utility.

Open terminal either via Ctrl+Alt+T keyboard shortcut or by searching for terminal from application menu. When it opens, run following commands one by one:

1. Download and install the repository keyring:

wget -qO- | sudo apt-key add -

Typer user password when it prompts and hit Enter to continue.

2. Add Vivaldi repository via command:

sudo add-apt-repository 'deb stable main'

3. Finally check updates and install the web browser via command:

sudo apt update && sudo apt install vivaldi-stable

Or upgrade from an old version via Software Updater utility.

(Optional): To remove Vivaldi apt repository from you system, launch Software & Updates and navigate to Other Software tab.

Paper GTK3 and Icon themes

This simple tutorial shows how to manually create a desktop slideshow with your photos in Ubuntu 20.04 LTS.

If you’re just looking for an automatic wallpaper changing software, here are four choices.

In Ubuntu Gnome, you can create your own wallpaper slideshow with simple XML file, then select it in Background settings.

XML slideshows in Background settings are displayed with a small clock emblem in the lower-right corner of the preview. (See the red rectangle area in the picture)

To create desktop slideshow via XML:

1.) First create an empty document, and re-name it to FILE_NAME.xml.

  • It’s not important where to put the XML file. In my case, I created it in sub folder of my Pictures directory: Pictures/Wallpaper/slideshow.
  • And the name is not important. In my case, it’s wallpaper-slideshow.xml.

2.) Open the XML file with text editor and write following line:

<?xml version="1.0" ?>

The file content is easy to read. It starts with <?xml version=”1.0″ ?>, then follows with a <background> node.

With in <background> node, you can add as many <static> and <transition> nodes as you can depends on number of wallpaper files.

While the <static> node contains display time (in seconds) and path to the picture file, the <transition> contains transition time and files.

Click to expand:

Make the XML slideshow visible in Background settings:

Open terminal (Ctrl+Alt+T) and run command to create the .local/share/gnome-background-properties folder if not exist:

mkdir .local/share/gnome-background-properties

Then create the config file and open with Gedit text editor:

gedit .local/share/gnome-background-properties/my-slideshow.xml

When it opens, paste following lines and change the file path in <filename> node:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE wallpapers SYSTEM "gnome-wp-list.dtd">
<wallpaper deleted="false">
<name>Wallpaper Slideshow created by Ji</name>

Finally open or re-open Background settings and you should see the new created background slideshow.

This simple tutorial shows how to install the latest Audacity 2.4.2 via PPA in Ubuntu 20.04, Ubuntu 18.04, and Linux Mint 20.

Audacity audio editor 2.4.x was missing from the unofficial PPA for a few months, due to build system change and my poor debian packaging skill.

Since the upstream maintainer has built the 2.4.2 package for Debian unstable and Ubuntu 20.10, backports for Ubuntu 20.04 and Ubuntu 18.04 now are here for you!

Note the package is built against system’s wxWidgets 3.0.x, while Audacity team recommends to use the patched 3.1.x. The PPA package seems working good, though I’m not an audio editor.

And I offer no warranty for the packages in PPA. Use it at your own risk!

How to Install Audacity 2.4.2 via PPA in Ubuntu 20.04:

Open terminal either from system application menu or by pressing Ctrl+Alt+T on keyboard. When terminal opens, run following commands one by one:

1.) Run command in terminal to add the PPA repository:

sudo add-apt-repository ppa:ubuntuhandbook1/audacity

Type user password (no asterisk feedback due to security reason) when it prompts and hit Enter to continue.

2. If you have a previous version installed, you can upgrade Audacity via Software Updater after adding the PPA.

upgrade audacity

or run following commands one by one to check updates and install (or upgrade) audacity 2.4.2:

sudo apt update

sudo apt install audacity


To remove the PPA repository, launch Software & Updates utility and navigate to ‘Other Software’ tab. Or simply run command in terminal:

sudo add-apt-repository --remove ppa:ubuntuhandbook1/audacity

To remove Audacity audio software, either use system package manager or run command in terminal:

sudo apt-get remove --autoremove audacity audacity-data

gnome shell

In Ubuntu 20.04 Gnome Shell, application indicator on top panel has wide spaces between icons. You can reduce the icon spacing via an extension called Unite.

Unite is a Gnome Shell extension which makes a few layout tweaks to the top panel and removes window decorations to make it look like Ubuntu Unity Shell. With the extension, your system tray area will look like:

To install the extension, do following steps one by one.

1.) Open terminal (Ctrl+Alt+T) and run command:

sudo apt install chrome-gnome-shell

2.) Run command to install the extension required x11-utils library:

sudo apt install x11-utils

3.) Go to…/unite/, toggle on and install the extension.

If you don’t see the toggle icon, click link to install browser extension and refresh this web page

The extension by default reduces top bar item spacing. To tweak other panel appearance, open Gnome Tweaks (or Extensions tool), and go to unite settings.

Liferea Feed Reader

This simple tutorial shows how to install Liferea feed reader 1.3.2 via PPA in Ubuntu 20.04, Ubuntu 18.04, and Linux Mint 20.

Liferea, stands for Linux Feed Reader, is a news reader for Gnome. The software is available in Ubuntu universe repository, but it’s old.

And here’s the PPA for the latest 1.3 development serious, which so far features:

  • New “Reader mode”.
  • Embed YouTube videos from MediaRSS feeds
  • Add support for subscribing to HTML5 websites without RSS/Atom feeds
  • Add MediaRSS support (e.g. Youtube feeds) to display descriptions and thumbnails
  • Many UI improvements, bug-fixes.

Install Liferea 1.3.2 via PPA:

1.) Open terminal from application launcher and run command to add the PPA:

sudo add-apt-repository ppa:ubuntuhandbook1/apps

Type your password when it prompts and hit Enter to continue.

2.) Then check updates and install the news reader via commands:

sudo apt update

sudo apt install liferea

or update the old package (if installed) via Software Updater utility:

upgrade Liferea via Software Updater


As the PPA also contains many other applications, you may remove the PPA either via Software & Updates > Other Software, or by running command:

sudo add-apt-repository --remove ppa:ubuntuhandbook1/apps

And remove the feed reader if want via command:

sudo apt remove liferea