This simple tutorial shows how to enable and set up hot corners features in Ubuntu 20.04 with the default Gnome desktop.
With hot corners enabled, when you move the mouse cursor and hit one of the screen corners, it performs a predefined action (e.g., show desktop, open application launcher, launch a software, and run custom command).
The default Gnome desktop only supports top-left corner opening Activities overview, though it’s not enabled by default. You can however set up more actions for the 4 corners via a Gnome Shell extension.
NOTE: Skip the first 2 steps if you’re not first time installing a Gnome Shell extension.
1.) Open terminal by pressing Ctrl+Alt+T on keyboard, then run command:
sudo apt install chrome-gnome-shell
2.) Go to extensions.gnome.org, and click the link to install the browser integration.
Once installed, select hot corner actions via extension setting either by Extensions utility or Gnome Tweaks tool.
Tip: To enable ‘show desktop’ function, press Ctrl+Alt+T on keyboard to open terminal and run command to install the wmctrl package (Thanks to @Peter Huang):
This is a step by step beginner guide shows how to check local network IP and public IP in both IP4 and IPv6 via either graphical interface or Linux commands in Ubuntu 20.04.
1. Find IP address via System Settings:
For the default Gnome desktop, you can check the wireless network IP address via:
Open Settings and navigate to Wi-Fi in left pane.
Click on the gear icon after the connected wifi network.
In the pop-up it shows the detailed information including your IP address.
To check the wired network IP address, do:
Open Settings and navigate to Network in left pane.
Click on the gear icon under connected wired network.
In the pop-up it shows the detailed information including your IP address.
2. Check Local IP address via ifconfig command:
For other desktops or Ubuntu server without an UI, you can run ifconfig command to find your IP.
ifconfig
If the command does not exit, run command to install it: sudo apt install net-tools
3. Check Local IP address via ip command:
There’s another command looks more straightforward. Simply run:
ip address
4. Check Your Public IP address:
You can search your public ip via Google or other web search engine. If you don’t have a web browser or you’re on Ubuntu server, following commands will tell the public IP.
ifconfig will tell the public IP if you are not behind a router.
This simple tutorial shows how to remove the left panel (dock launcher) in Ubuntu 20.04 Gnome desktop.
The left panel in Ubuntu 20.04 Gnome desktop is called Ubuntu Dock, a fork of Dash-to-dock extension. Via System Settings, you can change its position (left, right, bottom), icon size, and toggle auto-hide function.
With dconf editor, you can do more settings, e.g., shorten the panel so it looks like Mac OS style dock launcher, show trash icon, and move “Show Applications” to top (or left).
If you intend to remove this dock launcher in Ubuntu 20.04 LTS, it can be done easily by doing following steps.
1. Search for and open Extensions utility from system application launcher.
2. When the tool opens, scroll download and toggle off “Ubuntu Dock” extension.
That’s it!
Note: if you don’t see Extensions in ‘Show Applications’ app launcher, either search for and install Extensions in Ubuntu Software, or run command in terminal:
digiKam photo management software 7.0 was released a few days ago with greatly improved face detection and recognition.
digiKam 7.0 was released after one year of development. It features new deep learning faces management. No learning stage is required to perform face detection and recognition. And face detection reaches 97% of true positives.
The improved face detection and recognition also supports non-human faces, blurred faces, covered faces, profiles of faces, printed faces, faces turned away, partial faces, etc.
And it supports multiple cores to speed-up computations.
Other changes include:
Improved HEIF image format support
A new tool Image Mosaic Wall.
The SlideShow tool ported as plugin.
New RAW files support including the famous Canon CR3, Sony A7R4, and more:
Canon: PowerShot G5 X Mark II, G7 X Mark III, SX70 HS, EOS R, EOS RP, EOS 90D, EOS 250D, EOS M6 Mark II, EOS M50, EOS M200
DJI Mavic Air, Osmo Action
FujiFilm GFX 100, X-A7, X-Pro3
GoPro Fusion, HERO5, HERO6, HERO7
Hasselblad L1D-20c, X1D II 50C
Leica D-LUX7, Q-P, Q2, V-LUX5, C-Lux / CAM-DC25
Olympus TG-6, E-M5 Mark III.
Panasonic DC-FZ1000 II, DC-G90, DC-S1, DC-S1R, DC-TZ95
PhaseOne IQ4 150MP
Ricoh GR III
Sony A7R IV, ILCE-6100, ILCE-6600, RX0 II, RX100 VII
Zenit M
and multiple smartphones…
Download / Install digiKam:
1. Non-install single executable Linux Appimage is available in the official download page.
2. digiKam is also available as Flatpak package, you can get it from flathub repository.
This simple tutorial shows how to install the Deepin Desktop Environment in Ubuntu 20.04 LTS via PPA.
Deepin Desktop is the default desktop environment for UbuntuDDE Remix, a Remix flavor of Ubuntu system. An official PPA is available with Deepin desktop packages for Ubuntu 20.04.
This quick tutorial shows how to change the default login screen display manager (e.g., gdm3, lightdm, kdm) in Ubuntu 20.04.
Ubuntu 20.04 Gnome desktop uses GDM3 as the default display manager. If you installed other desktop environments in your system, then you may have different display managers.
To change the default display manager, open terminal from system application launcher, and do following steps one by one.
1.) Check the current running display manager by running command:
systemctl status display-manager.service
You may also run cat /etc/X11/default-display-manager to get the result.
2. Run command to reconfigure the default manager:
sudo dpkg-reconfigure gdm3
NOTE: replace gdm3 in the command with the one you got in step 1).
3.) It will bring up the package configuration screen, if you have more than one display managers installed:
4.) Hit enter in the previous screen, then press Up / Down arrow keys to switch the display manager and hit Enter.
This simple tutorial shows how to install the latest Pidgin instant messaging client, so far it’s v2.14.1, in Ubuntu 20.04 and Ubuntu 18.04.
Pidgin is a chat program which lets you log in to accounts on multiple chat networks simultaneously. This means that you can be chatting with friends on AIM, talking to a friend on Google Talk, and sitting in an IRC chat room all at the same time.
While the software package in Ubuntu universe repository is always old. The latest release now is Pidgin 2.14.1, which can be installed via Flatpak package from flathub repository.
How to Install Pidgin 2.14.1 in Ubuntu:
1. Setup Flatpak framework in Ubuntu:
First open terminal from system application launcher. When it opens, run command to install flatpak:
sudo apt install flatpak
Then add the flathub repository by running command:
Want to display a scrolling “The Matrix” like screen in Ubuntu desktop? You can do the job easily via a command line tool called cmatrix.
CMatrix is based on the screensaver from The Matrix website. It shows text flying in and out in a terminal like as seen in “The Matrix” movie. It can scroll lines all at the same rate or asynchronously and at a user-defined speed.
1. To install cmatrix, simply open terminal from application launcher and run command:
sudo apt install cmatrix
2. Once installed, run cmatrix command to start the display:
cmatrix
You can press F11 to toggle on (off) terminal FULL-SCREEN mode. And press Ctrl+C (or q) to stop the process.
3. (Optional) There are some command line options. You can get them by running command:
cmatrix -h
Note to use the Linux mode -l option, you need to switch to TTY console (Ctrl+Alt+F3).
This simple tutorial shows how to install the latest GIMP image editor 2.10.20 in Ubuntu 20.04, Ubuntu 18.04, Linux Mint 19.x, and 20 via new PPA repository.
Although GIMP is available as both the containerized Snap and Flatpak packages, I prefer installing GIMP deb package via apt repository and receiving updates via Software Updater.
