GIMP extra color palettes

Before the next major GIMP 3.0, a new maintenance update for the 2.10 series GIMP 2.10.24 now is available to install.

Though it’s not officially announced at the moment of writing, GIMP has provided the 2.10.24 source tarball & Windows exe for downloading in its website.

And both the Flathub repository and unofficial Ubuntu PPA have updated the packages for the new release.

What’s new in GIMP 2.10.24 according to the release note:

  • Off-canvas point snapping
  • GeoTIFF metadata support (georeferencing information embedded within a TIFF file used by map makers)
  • Many improvements in the metadata viewer and editor
  • Many file format supports improved: HEIF, PSP, TIFF, JPEG, PNG, PDF, DDS, BMP, PSD
  • New “Negative Darkroom” operation to simulate enlargement prints from scans of photographic negatives.
  • The RAW image import now handles darktable 3.6 and over
  • New Kabyle translation

How to Install GIMP 2.10.24 in Ubuntu:

Method 1: Install GIMP via the universal flatpak package:

If you’re OK with the flatpak package which runs in sandbox, open terminal and run following commands one by one to install it:

1. Firstly add PPA for updated Flatpak package (required for Ubuntu 18.04 only):

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

2. Install flatpak daemon if you don’t have it:

sudo apt install flatpak

3. Add flathub repository which hosts the software packages:

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

4. Finally install GIMP flatpak package via command:

flatpak install flathub org.gimp.GIMP

NOTE: as flatpak runs in sandbox, it takes much more disk space for run-time libraries.

5. (Optional) If you want to remove the package, run command:

flatpak uninstall org.gimp.GIMP

Method 2: install GIMP via Ubuntu PPA:

For those prefer the classic .deb packages, the unofficial PPA has made the new release packages for Ubuntu 20.04, Ubuntu 20.10, and Ubuntu 21.04.

Due to compile issue, the package for Ubuntu 18.04 is stuck at v2.10.22 at the moment.

1.) Open terminal from system application launcher. When it opens, run command to add the PPA:

sudo add-apt-repository ppa:ubuntuhandbook1/gimp

Type user password (no asterisk feedback) for sudo prompts and hit Enter to continue.

2.) If an old version of GIMP .deb package was installed, upgrade it via Software Updater (Update Manager) utility.

or run apt commands in terminal to install GIMP:

sudo apt install gimp

If you’re going to upgrade the image editor from command line, I’d recommend to RUN this command instead, so to also install the updated dependency libraries.

sudo apt upgrade

3.) (Optional) To restore GIMP to the stock version in main Ubuntu repository, run command to purge the PPA:

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

The free and open-source planetarium software Stellarium 0.21.0 was released today. Here’s how to install it in Ubuntu 21.04, Ubuntu 20.10, Ubuntu 20.04, Ubuntu 18.04 via PPA.

The new release completed the work on accurate planet axes, including Lunar libration. It also features visualisation of Earth shadow for Lunar eclipses, the latest algorithms for planet magnitudes. Planets are now scalable and Solar glare switchable for didactic applications.

Other changes include:

  • Better texture for the Lunar surface.
  • Enhanced Calendars plugin.
  • Replaced “arabic” by more accurate “al-Sufi” skyculture.
  • Added lines for the Invariable Plane and Projected Solar Equator.
  • Added solar altitude to planetary feature nomenclature.
  • Added new 4k texture for the Moon (required re-balancing planet shader brightness)
  • Added more cardinal points.
  • Added a new sky culture based on Al-Sufi “Book of Fixed Stars” written ~ 964 AD.
  • Added Old Hindu calendars
  • Added Islamic (algorithmic) and Hebrew calendar.
  • Added French Revolution calendar (arithmetic version)
  • Added Persian (arithmetic) calendar
  • And much more other changes, see the release note for details.

How to Install Stellarium 0.21.0 via PPA:

The Stellarium developers team maintains an official Ubuntu PPA with the latest packages for all current Ubuntu releases.

1. Open terminal either by pressing Ctrl+Alt+T on keyboard or by searching for ‘terminal’ from application menu. When it opens, run command to add the PPA:

sudo add-apt-repository ppa:stellarium/stellarium-releases

Type user password (no asterisk feedback) when it prompts and hit Enter.

2. Then either upgrade Stellarium from an old version with Software Updater utility:

Or run following commands to install or upgrade the software from terminal:

sudo apt update

sudo apt install stellarium


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

sudo apt-get remove --autoremove stellarium

And remove the PPA via “Software & Updates” utility under Other Software tab.

GNU Emacs text editor 27.2 was released as a new maintenance release.

Emacs 27.2 is a bug-fix release with no new features. According to the changelog, it changed the behavior of the user option ‘resize-mini-frames‘. If set to a non-nil value which isn’t a function, resize the mini frame using the new function ‘fit-mini-frame-to-buffer’ which won’t skip leading or trailing empty lines of the buffer.

Emacs now ignores modifier keys when IME input is used. By default, pressing Ctrl, Shift, and Alt keys while using IME input will no longer apply the modifiers to the produced characters, as there are IMEs which use keys with modifiers to input some characters. Customize the variable ‘w32-ignore-modifiers-on-IME-input’ to nil to get back the old behavior.

And the user option ‘tramp-completion-reread-directory-timeout’ is now obsolete.

How to Install Gnu Emacs in Ubuntu:

For those prefer the classic apt repository, keep an eye on the Kevin Kelley’s PPA, though it’s not been updated at the moment of writing.

Emacs is also available as the containerized Snap package, which is however at version 27.1 at the moment.

The community maintained Flatpak package has built Emacs 27.2 for Linux users. Ubuntu 20.04 and higher users can open terminal and run following commands one by one to install it:

  • Install flatpak framework if you don’t have it:
    sudo apt install flatpak

  • Add flathub repository which hosts the flatpak packages:
    flatpak remote-add --if-not-exists flathub

  • Finally install Emacs flatpak package:
    flatpak install flathub org.gnu.emacs

(Optional) To remove the flatpak package, simply run command in terminal:

flatpak uninstall org.gnu.emacs

Want to automatically set the background & lock screen wallpaper once per day to Microsoft Bing image of the day? It’s easy to do this in Ubuntu via an Extension.

For Ubuntu 18.04, Ubuntu 20.04, Ubuntu 20.10, and all other Linux with Gnome Desktop, a lightweight Gnome Shell Extension “Bing Wallpaper” make it possible to set Microsoft Bing image as background and/or lock screen wallpaper.

The extension downloads Bing image and refreshes your wallpaper once per day. By providing system tray indicator menu, you can copy image to clipboard and change the extension preferences.

How to Install Bing Wallpaper Extension:

1.) Firstly open terminal (Ctrl+Alt+T) and run command to install the chrome-gnome-shell package, which will add Gnome Shell extensions integration for web browsers, if you don’t have it.

sudo apt install chrome-gnome-shell

2.) Then go to the extension web page, turn on the toggle icon to install it.

Don’t see the toggle icon? Follow the link to install the browser extension and refresh the web page.

Once installed the extension, an indicator applet should appear in the top-right corner. You can either click “Refresh Now” or wait till it refreshes wallpaper automatically.

For Bing locale, download folder, screen resolution, and other settings, just go to indicator menu ‘Settings’ option.

Uninstall the Exension:

To remove the extension, either turn off the toggle icon in the previous link page, or use Extensions tool (install it via sudo apt install gnome-shell-extension-prefs command).


The free and open-source BitTorrent client qBittorrent 4.3.4 was released. Here’s how to install it in Ubuntu 20.04, Ubuntu 20.10 via PPA.

qBittorrent 4.3.4 reworked the sorting logic. To get the old sorting order for the “queue number” column, first sort on the “Completed On” column and then sort on the “#”(queue number) column.

The new release now requires Qt >= 5.12. Ubuntu 18.04 is no longer supported via the official PPA due to outdated system libraries. You can however get it via the flatpak package since it gets most run time libraries bundled.

Changes in qBittorrent 4.3.4 include:

  • Add ability to prioritize selected items by shown file order.
  • Allow tab to escape the text box in “Edit trackers” dialog.
  • Support sub-sorting in Transferlist.
  • Expose ToS setting from libtorrent.
  • Improve tracker entries handling.
  • Enlarge “speed limit” icon slightly.
  • Don’t prevent system sleep due to errored torrents.
  • Use stable sorting in transfer list.
  • Apply “Hide zero/infinity values” to “Time Active”, “Down/Up Limit” and ETA columns.
  • Fix potential out-of-bounds access.
  • Add a 3-Hour graph.
  • Add option to disable icons in menus.
  • Improve detection of filename extension of audio/video files.
  • Various drawing improvements of progress bar.
  • Raise minimum libtorrent version to 1.2.12, Qt version to 5.12.

How to Install qBittorrent 4.3.4 via PPA:

The official qBittorrent PPA has built the new release packages for Ubuntu 20.04 and Ubuntu 20.10.

1. To add the PPA, open terminal by either pressing Ctrl+Alt+T on keyboard or searching for “Terminal” from application menu. When it opens, run command:

sudo add-apt-repository ppa:qbittorrent-team/qbittorrent-stable

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

2. If an old version was installed on your system, upgrade it via Software Updater,

upgrade qBittorrent

or run following commands to install /upgrade qBittorrent in terminal:

sudo apt update

sudo apt install qbittorrent


To remove qBittorrent PPA, either go to Software & Updates -> Other Software, or run command in terminal:

sudo add-apt-repository --remove ppa:qbittorrent-team/qbittorrent-stable

To remove the bittorrent client, either use your system package manager or run command:

sudo apt-get remove --autoremove qbittorrent