Archives For Howtos

Ubuntu 18.04

Ubuntu 20.10 Groovy Gorilla was officially released! Here’s how to upgrade from Ubuntu 20.04 LTS.

Ubuntu 20.10 will be supported for 9 months until July 2021. It features Linux Kernel 5.8, desktop images for Raspberry Pi 4, and GNOME 3.38 on Ubuntu Desktop.

Other changes include:

  • Airtime Queue limits for better WiFi connection quality
  • USB 4 (Thunderbolt 3 protocol) support added
  • Intel Gen11 (Ice Lake) and Gen12 (Tiger Lake) graphics support
  • Initial support for AMD Family 19h (Zen 3)
  • Initial support for POWER10
  • Toolchain update: GCC 10, LLVM 11, Python 3.8.6, etc.
  • nftables is now the default backend for the firewall.
  • The latest OpenStack, updated apps, and more.

Upgrade Ubuntu 20.04 to Ubuntu 20.10:

Ubuntu 20.10 ISO images are available to download at

If you want to upgrade to Ubuntu 20.10 Groovy Gorilla from Ubuntu 20.04, do following steps one by one.

1. Back up all your important data. And you may also create a system restore point via TimeShift which is available in Ubuntu Software.

2. Open Software & Updates and do:

  • select download from Main Server in the first tab.
  • disable all third-party PPAs in the second tab.
  • select ‘Notify me of a new Ubuntu version: For any version‘ in the third tab.

3. Open Software Updater and install all system updates! Restart after installation if it asks.

4. Open Software Updater again, and it should prompt that Ubuntu 20.10 is available to upgrade.

5. Click on the Upgrade… button. Type your password when it prompts. You will be presented with the Release Notes for the release you’re about to upgrade to.

Click on the Upgrade button. It will download the upgrading tool and show you a Distribution Upgrade window allows you to monitor progress. If everything goes OK, you’ll be prompted to restart the system to complete the upgrade.

CopyQ, free open-source advanced clipboard managing software, released version 3.13.0 with new script function and command line options.

CopyQ 3.13.0 release highlights:

  • New focusPrevious() script function to activate window that was focused
    before the main window.
  • Export now write data to a temporary file before saving.
  • Display command are now also applied on item preview
  • New command line option “tray_menu_open_on_left_click” to check default mouse
    button behavior for tray icon.
  • New command line option “activate_item_with_single_click” to activate items
    with single click.
  • New command line options “filter_regular_expression” and “filter_case_insensitive” to change the item search behavior.
  • New command line option “native_menu_bar” to disable native/global menu bar.
  • Updated icons and various bug-fixes.

How to Install Copyq 3.13.0 in Ubuntu:

The official PPA repository has made the latest packages for Ubuntu 16.04, Ubuntu 18.04, Ubuntu 20.04, and Ubuntu 20.10.

1. To add the PPA, open terminal (Ctrl+Alt+T) from application menu and run command:

sudo add-apt-repository ppa:hluk/copyq

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

2. Then install CopyQ either via Synaptic package manager or by running commands in terminal:

sudo apt update

sudo apt install copyq

Once installed, start the clipboard manager from application menu and you’ll see the icon in system tray area.


To remove the software, either use Synaptic package manager or run command:

sudo apt-get remove --autoremove copyq

To remove PPA repositories, launch Software & Updates and navigate to Other Software tab.

Pitivi video editor 2020.09 was released a few days ago. Here’s how to install it in Ubuntu 20.04, Ubuntu 18.04, and derivatives.

It’s been more than 2 years since the last stable release, Pitivi 2020.09 features a plugin system, easy Ken-Burns effect, developer console plugin, timeline markers, user-interface and workflow improvements, a refactored media library, new keyboard shortcuts, and much more.

How to Install Pitivi in Ubuntu:

The new release has been into Ubuntu 20.10 universe repository. For Ubuntu 18.04, Ubuntu 20.04, Linux Mint and other Linux, it can be installed via Flathub repository.

1. Open terminal from system application launcher, then run command to install Flatpak (if you don’t have it):

sudo apt install flatpak

For Ubuntu 18.04, you have to add the PPA first before installing the flatpak daemon:

sudo add-apt-repository ppa:alexlarsson/flatpak && sudo apt update

2. Then add the flathub repository by running command:

flatpak remote-add --if-not-exists flathub

3. Finally install Pitivi video editor:

flatpak install flathub org.pitivi.Pitivi

Uninstall Pitivi Flatpak package:

For any reason, you can remove the flatpak package easily by running command in terminal:

flatpak uninstall org.pitivi.Pitivi

Calibre, cross-platform open-source comprehensive e-book software, released version 5.0 with some great new features.

Calibre 5.0 features highlighting in the E-book viewer. Simply select text and click the Highlight selection button. It can be colors, underlines, strikethrough, etc. and has added notes. All highlights can be both stored in EPUB files and centrally in the Calibre library.

The new release also feature Dark mode support. On Windows and Mac, it is activated automatically based on OS settings. In Ubuntu Linux, launch the software in dark mode via CALIBRE_USE_DARK_PALETTE=1 environment variable.
Other features in the release include:

  • Python 3 port. Some third-party plugins will no longer work, until they are also ported to Python 3.
  • Support both vertical and right-to-left text.
  • Enhanced search in the E-book viewer
  • Support bookmarking in content server’s in-browser viewer

How to Install Calibre 5.0 in Ubuntu Linux:

Open terminal (Ctrl+Alt+T) and run command to download & install the official installer script:

sudo -v && wget -nv -O- | sudo sh /dev/stdin

Once installed, open it from system application launcher and enjoy!

Enable Calibre Dark Mode in Ubuntu:

To temporarily open the e-book reader in dark mode, simply run command:

export CALIBRE_USE_DARK_PALETTE=1 && calibre

To make it permanent, run command to edit the .desktop file and do:

  • add env CALIBRE_USE_DARK_PALETTE=1 at the beginning of the values of “TryExec” and “Exec”.
  • remove --detach flag, or the shortcut icon will disappear.

How to Remove Calibre E-book software in Linux:

To remove the software, open terminal and run command:

sudo calibre-uninstall

For those prefer Deb package to the containerized Snap or Flatpak package, Emacs text editor 27.1 now is available to install via an Ubuntu PPA for all the current releases.

GNU Emacs 27.1 was released more than 1 month ago. Thanks to Kevin Kelley, you can now install it in Ubuntu via this PPA repository.

The PPA package features:

  • native support for JSON
  • support for ACLs
  • support for libgmp
  • support for enhanced text rendering through Cairo and HarfBuzz
  • remove ImageMagick support
  • remove xwidgets support for Ubuntu 16.04.

1. Open terminal either from system application launcher or by pressing Ctrl+Alt+T on keyboard. When it opens, run command to add the PPA:

sudo add-apt-repository ppa:kelleyk/emacs

Type user password (no asterisk feedback) if it asks and hit Enter to continue.

2. Then refresh system package cache and install the editor via 2 commands:

sudo apt update

sudo apt install emacs27

If you want, you can install the text-only user interface via sudo apt install emacs27-nox.

The PPA also contains emacs26 and emacs25 packages for choices.

(Optional) To uninstall the PPA, either go to ‘Software & Updater -> Other Software’, or run command:

sudo add-apt-repository --remove ppa:kelleyk/emacs

And remove the Emacs text editor if you want by running command:

sudo apt remove --autoremove emacs27