The GTK feed reader Liferea released version 1.13.9 recently with generic Google Reader API support, UI improvements, and bug-fixes.

This is the last release of the 1.13 unstable series of Liferea (Linux Feed Reader). It makes possible to import from FeedHQ, FreshRSS, Basquz, and other feed readers using Google Reader API (exclude Miniflux due to this bug).

So now besides manually adding websites, it now supports adding following sources all together:

  • Planet, BlogRoll, OPML.
  • Google Reader API.
  • Reedah.
  • Tiny Tiny RSS.
  • TheOldReader.
  • Miniflux.

Other changes in this release include:

  • Update to Readability.js 0.41 for better image and table handling.
  • Improve HTML5 extraction
  • Hide unused expander space in item list and drop enclosure icon from item list, which saves horizontal space.
  • Improve performance by different check order in itemset merging
  • Subscribing defaulted to HTML5 feeds even when real feeds do exist.

How to Get Liferea 1.13.9:

For Linux with Flatpak support out-of-the-box, e.g., Linux Mint, Pop! OS and Fedora, you may simply search for and install the software package as Flatpak from system package manager.

For Ubuntu based user prefer the classic .deb package, here’s the unofficial PPA contains the package for Ubuntu 20.04 and Ubuntu 22.04.

1. First, press Ctrl+Alt+T on keyboard to open terminal. When it opens, run the command below to add the PPA:

sudo add-apt-repository ppa:ubuntuhandbook1/apps

2. Next, either update the feed reader from an existing release via “Software Updater” or run command below to install it:

sudo apt install liferea

NOTE: Linux Mint user need to first run sudo apt update to refresh package cache manually.


For any issue, you may uninstall the PPA repository by running the command below in terminal:

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

And remove the Liferea news reader either via your system package manager or by running command below in terminal:

sudo apt remove --autoremove liferea liferea-data

For Ubuntu 22.04, there’s now an extension to enable animation when you move mouse pointer over app icons on the left/bottom panel.

It’s a magnifying animation for the dock app icons under mouse cursor. Which, remind me of the old popular Avant Window Navigator.

The extension is called ‘Dash Animator‘ designed for Ubuntu with the default GNOME Desktop. As it requires GNOME 40+, only Ubuntu 22.04 meet the request so far. Though, it should also work on other GNOME based Linux that uses Dash-to-Dock, such as Manjaro Linux.

How to Install the “Dash Animator” Extension in Ubuntu 22.04

1. Firstly, search for and install “Extension Manager” application from Ubuntu Software.

If Ubuntu Software does not work, you may press Ctrl+Alt+T to open terminal, and run the command below to install the tool:

sudo apt install gnome-shell-extension-manager

2. After installed the tool, press Super (the ‘Windows’ logo key) to open Activities overview. Then search for and open it.

3. When it opens, navigate to ‘Browse’ tab, search for “dash to dock animator“, and finally click on “Install” button to install the extension.

Other Linux may simply go to the extension page via the link button below. And, use the ON/OFF switch to install it.

Without any configuration, the animation should work immediately after properly installed the extension.

(Optional) To disable or remove the animation, either use Gnome Extensions App or Extension Manager (both available in Ubuntu Software), or turn off the slider in the extension web page (see the button above).

Disable or Remove via Extension Manager

NOTE: removing the extension need restart GNOME (log out and back in) to apply change.

Looking for an alternative app launching tool for your Linux? Findex is one with highly customizable interface and fast performance.

The app runs silently in the background. Once you hit the shortcut key, a search box pop-up in screen center allows to quickly search and open desired applications.

Findex search apps

The tool is super fast as it focuses on performance. It supports fuzzy searching and allows to configure the following things:

  • Search window width.
  • Minimize and maximize window height.
  • Highlight color for match content.
  • Icon size, result size, and shortcut key

How to Get Findex:

The current 0.6.0 release does not work on Wayland session, though it’s said to bring it back in later version. Which means so far, Ubuntu and Fedora need to switch to ‘Ubuntu on Xorg‘ or ‘Gnome on Xorg‘ from the login screen to be able to use the tool.

1. Firstly, download the tarball from the github release page:

2. Then extract it in file manager. Right-click on generated folder and select ‘Open in Terminal’ to open that folder as working directory in terminal.

3. Finally, run command in terminal to start it:


Run it first time to verify if it works!

To verify if it works, just press Shift + Space on keyboard. The search box should prompt up allows to type searching your applications.

4. To make Findex runs automatically at startup, run the commands below one by one in the same terminal window:

  • Move the executable file to system path via command:
    sudo mv findex /usr/bin
  • Move the services file into systemd folder:
    sudo mv findex*.path findex*.service /etc/systemd/user/
  • Finally, enable the services:
    systemctl --user enable findex.service
    systemctl --user enable findex-restarter.path

Copy to PATH, and make it auto-start

5. To configure the keyboard shortcut and search appearance, open terminal and run command:

gedit ~/.config/findex/settings.toml

Replace gedit with your system text editor. After saving changes, you need to restart the service by running command: systemctl --user restart findex.service.


To disable the service, use command:

systemctl --user disable findex.service
systemctl --user disable findex-restarter.path

Then remove the executable file as well as service files:

sudo rm /usr/bin/findex /etc/systemd/user/findex*

For those want to unlock / decrypt PDF files, there’s now a stupid simple graphical tool to do the job in Linux.

It’s easy to encrypt you PDF files in Ubuntu Linux since the built-in LibreOffice office suite has the option on ‘Export as PDF’ dialog. However, there seems no easy way to remove password for PDF file, other than using qpdf command:

qpdf --decrypt --password=<PASSWORD> input.pdf output.pdf

unlockR is a new GTK4 application that use Libadwaita to provide a modern simple user interface to decrypt your PDF files.

It’s so simple that you just need to click ‘Open a File‘ to select your PDF, then type the password, and finally hit ‘Decrypt’. It doesn’t change the original file, but generates a new PDF without password protect.

As the picture shows, it has both light and dark mode that switches automatically according your system color scheme.

NOTE: This app is NOT about to crack password on a PDF file. You need the password to be able to decrypt it.

How to Install unlockR

It is a free open-software software works on both Linux and Windows. For Windows package, just grab the zip from github releases page:

For Linux, it offers the binary package via universal Flatpak. Ubuntu user need to first press Ctrl+Alt+T on keyboard to open terminal, and run command to install the Flatpak daemon:

sudo apt install flatpak

Next, install the app package via command:

flatpak install

Like normal applications, search for and open it from ‘Activities’ overview (or start menu) after installation.


To remove the Flatpak package, open terminal and run command:

flatpak uninstall --delete-data com.github.jkotra.unlockr

You may also clear useless runtime libraries via flatpak uninstall --unused.

For those who want to install the latest Tilix terminal emulator 1.9.5 in Ubuntu 22.04 LTS. You can now get it from PPA repository.

Tilix is a popular tiling terminal emulator, that allows to split terminal window horizontally and/or vertically, and drag and drop re-arrange them. It also has many other great features including sync input between terminals, background images, quake mode (drop-down terminal), and custom hyperlinks.

The terminal emulator package is available in Ubuntu repository, but old. Though, the latest v1.9.5 has been released for 5 months. Changes in Tilix 1.9.5 include:

  • Disable advanced paste when there is no linebreak like iTerm2
  • Add environment variable when in quake mode
  • Add possibility to configure always enabled regex
  • And various bug-fixes.

1. Add PPA

The unofficial PPA so far contains the latest package for Ubuntu 22.04 only. Due to dependency issue, it does not build in Ubuntu 20.04.

To add the PPA, press Ctrl+Alt+T on keyboard to open terminal and run command:

sudo add-apt-repository ppa:ubuntuhandbook1/tilix

2. Update package cache

Ubuntu now automatically refresh the package cache while adding PPA. But, you have to run apt update command manually in some derivatives, e.g., Linux Mint.

sudo apt update

3. Install Tilix

Finally, install the software package by running command in terminal:

sudo apt install tilix

After installation, search for and open Tilix either from start menu or by searching from ‘Activities’ overview, depends on which DE you have.

How to Uninstall:

For any issue, you can install ppa-purge and use the tool to purge PPA. Which will also downgrade all installed packages from that PPA to the stock version in your Ubuntu:

sudo apt install ppa-purge && sudo ppa-purge ppa:ubuntuhandbook1/tilix

And if you need to terminal emulator any more, remove it either from Ubuntu Software or by running command in terminal:

sudo apt remove --autoremove tilix tilix-common