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Install Oracle Java JDK 21 / 24 in Ubuntu 24.04 | 22.04 | 20.04

Last updated: March 19, 2025

This simple tutorial shows how to install the latest Oracle Java (JDK 21 or JDK 24) in Ubuntu Linux via the official binary package.

There used to be unofficial Ubuntu PPA to automate the process of installing Java JDK and setup the environment, however, discontinued. So, here’s the tutorial to manually install the Java package and set as default.

Step 1: Download the pre-build binary package

Oracle provides the pre-build binary packages for Linux, Windows, macOS, available to download via the link below:

Download Oracle Java

First, select JDK version, then choose download:

either “x64 Debian Package” for amd64 devices, e.g., modern Intel/AMD CPUs.
or “ARM64 Compressed Archive” for arm64 (aarch64) devices, e.g., Raspberry Pi and Apple Silicon.

If you don’t even know your CPU architecture type, open terminal (Ctrl+Alt+T) and run uname -m or dpkg --print-architecture command to tell.

Step 2: Install the JDK package

After downloaded the pre-build package, install it via either option below depends on CPU architecture type.

For x86_64 (amd64) AMD/Intel

For modern AMD/Intel platform, press Ctrl+Alt+T to open terminal, and run command to install the downloaded .deb package:

sudo apt install ~/Downloads/jdk-21_linux-x64_bin.deb

Here replace 21 in command if you downloaded JDK 24. Or, just drag and drop the .deb package from your downloads folder into terminal to auto-insert path to that file.

The .deb package include a post-install script that automatically set the JDK installation with a higher priority. So, it should be default if you have multiple java.

Just in case, you may run the command below to manually set default Java:

sudo update-alternatives --config java

In the output, input the number for your desired Java version and hit Enter.

Similarly, you may run the command below to configure default Javac, Jshell, Jar, etc.

sudo update-alternatives --config javac

For Intel/AMD platform, you’re done!

Install the Compressed Archive for ARM devices

For the ARM computers (e.g., Raspberry Pi, Apple M1/2, etc), first open terminal (Ctrl+Alt+T) and run command to make sure the /usr/lib/jvm directory is exist:

sudo mkdir -p /usr/lib/jvm

Then, extract the downloaded archive to that directory by running command:

sudo tar -zxf ~/Downloads/jdk-21_linux-aarch64_bin.tar.gz -C /usr/lib/jvm/

Also, replace 21 in command with 24 if you selected JDK 24. After that, you may run the command below to list that directory content which should include the new generated jdk-21 (or jdk-21.x.x) sub-folder.

3. Set JDK 21/24 as default (for ARM only):

NOTE 1: For Intel/AMD, you’re DONE after installed the .deb package and set default Java. This is only required for ARM platform.

NOTE 2: The JDK root folder-name may vary depends on which package you installed. It may be ‘jdk-21’, ‘jdk-21.0.1’, ‘jdk-24’, ‘jdk-24.0.1’, and so forth. Run ls /usr/lib/jvm to tell and replace jdk-21 in commands below accordingly.

a.) Create symbolic links for the executable files:

sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-21/bin/java 1

sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-21/bin/javac 1

sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk-21/bin/jar 1

As mentioned, you need to replace “jdk-21” in command with e.g., jdk-21.0.1, jdk-21.0.6, jdk-24, jdk-24.0.1, etc. accordingly!!!

Similarly, add links for other executable files (e.g., jarsigner, jlink, javadoc) as you need.

b.) Next, run the commands below one by one, and type number to select Java JDK 21 as default.

sudo update-alternatives --config java

sudo update-alternatives --config javac

sudo update-alternatives --config jar

When done, verify by running command in terminal:

java -version

javac -version

4. Set JAVA_HOME (for ARM only):

As well, you only need to do this for ARM package. If installed the .deb version, just verify JAVA HOME via the bottom command.

Also, replace ‘jdk-21’ below according to ls /usr/lib/jvm command output (e.g., jdk-21.0.6, jdk-24, jdk-24.0.x).

Option 1.) Set JAVA_HOME for current terminal console, that will work until you close it:

export JAVA_HOME=/usr/lib/jvm/jdk-21

setenv JAVA_HOME=/usr/lib/jvm/jdk-21

Option 2.) To make it permanent, create and edit config file via command:

sudo gnome-text-editor /etc/profile.d/jdk.sh

Depends on your desktop environment, you may replace gedit with mousepad for XFCE, xed for Linux Mint, pluma for MATE, kate for KDE Plasma, gedit for Ubuntu 22.04 or older.

then add following lines:

export J2SDKDIR=/usr/lib/jvm/jdk-21
export J2REDIR=/usr/lib/jvm/jdk-21
export PATH=$PATH:/usr/lib/jvm/jdk-21/bin:/usr/lib/jvm/jdk-21/db/bin
export JAVA_HOME=/usr/lib/jvm/jdk-21
export DERBY_HOME=/usr/lib/jvm/jdk-21/db

And create anther one for C shell:

sudo gedit /etc/profile.d/jdk.csh

add following lines and save it:

setenv J2SDKDIR /usr/lib/jvm/jdk-21
setenv J2REDIR /usr/lib/jvm/jdk-21
setenv PATH ${PATH}:/usr/lib/jvm/jdk-21/bin:/usr/lib/jvm/jdk-21/db/bin
setenv JAVA_HOME /usr/lib/jvm/jdk-21
setenv DERBY_HOME /usr/lib/jvm/jdk-21/db

Finally, change the permissions via command, and it should take place next time you log in.

sudo chmod +x /etc/profile.d/jdk.csh /etc/profile.d/jdk.sh

To verify JAVA HOME, run the command below in terminal at next login:

java -XshowSettings:properties -version

Uninstall Java JDK 21/24

To uninstall the Java package, open terminal (Ctrl+Alt+T) and run command:

sudo apt remove --autoremove jdk-21 jdk-24

In the commands below, replace jdk-21, with jdk-21.0.5, jdk-24, jdk-24.0.1, etc, depends on which version you installed.

For the ARM version, simply remove all the installed files, by running the commands below one by one:

Remove the alternative links:

sudo update-alternatives --remove java /usr/lib/jvm/jdk-21/bin/java

sudo update-alternatives --remove javac /usr/lib/jvm/jdk-21/bin/javac

sudo update-alternatives --remove jar /usr/lib/jvm/jdk-21/bin/jar

Remove JDK installation files:
```
sudo rm -R /usr/lib/jvm/jdk-21
```

And remove JAVA HOME config files:

sudo rm /etc/profile.d/jdk.sh

sudo rm /etc/profile.d/jdk.csh

In Howtos java

How to Install Stellarium Astronomy Software 0.22.0 in Ubuntu 22.04 LTS

Last updated: March 28, 2022

Stellarium 0.22.0 released! Here’s how to install and keep it up to date in Ubuntu 22.04, Ubuntu 20.04 via PPA.

Stellarium is a free open source planetarium for Linux, Windows, and macOS. It shows a realistic sky in 3D, just like what you see with the naked eye.

While the software package in Ubuntu repository is always old, the latest version so far is Stellarium 0.22.0 that features:

AstroCalc: Eclipse Finder
AstroCalc: RTS (Rises, Transits, Settings)
Switch from Bortle scale to physical brightness values for light pollution.
Allow tweaks for the atmosphere brightness/color model and tone mapping
Several new calendars in the Calendars plugin
Seasonal polar caps on Mars
New and improved sky cultures
Larger textures allowed in Scenery3D
Improved OnlineQueries and Satellites plugin
Many fixes in core and plugins.
A large number of bug fixes and closed feature requests and enhancements

How to install Stellarium:

The software developer team provides Ubuntu packages via PPA repository. So far, it supports Ubuntu 18.04, Ubuntu 20.04, Ubuntu 21.10, and upcoming Ubuntu 22.04.

1. Add the PPA

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

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

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

2. Install / Upgrade the Astronomy Software

If you have already installed an old version of the software package, simply launch Software Updater to update the package to the latest:

Or, run the command below in terminal to install (or upgrade) it for the first time:

sudo apt install stellarium

Ubuntu 18.04 needs to refresh cache first via sudo apt update.

Uninstall Stellarium:

To remove the software, run the command below in terminal:

sudo apt remove --autoremove stellarium

And remove the PPA repository either via command:

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

or by launching Software & Updates and remove source url from ‘Other Software’ tab.

In Howtos

‘Drawing’ – A MS Paint Similar Tool to Edit Images in Linux

Last updated: March 27, 2022

There are quite a few image editing tools for Linux desktop. ‘Drawing’ is the one that promoted itself a Microsoft Paint alternative for Linux.

The app provides basic editing features, including crop, resize, skew and rotate images, apply simple filters, insert or censor text. As well, it supports for drawing with pencil, straight line, curve tool, many shapes, several brushes, with colors and other common used options.

Drawing. Tools with text

The app is targeted for GNOME, but also works on other desktop, e.g, elementaryOS Pantheon. And, it should also be compatible with the Pinephone and Librem 5 smartphones.

Other features of Drawing include:

follow system color (light or dark).
support PNG, JPEG, and BMP.
Copy to clipboard.
Keyboard shortcuts.
Undo/Redo.
Full-screen mode.

Drawing Dark Mode

How to Install Drawing in Ubuntu:

The app is available in Ubuntu repositories but old! For the latest release, user may use either the Flatpak package, or the Ubuntu PPA.

The Ubuntu PPA so far provides the packages for Ubuntu 18.04, Ubuntu 20.04, Ubuntu 21.10, and derivatives, e.g., Linux Mint 20.

1. Add the Ubuntu PPA

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

sudo add-apt-repository ppa:cartes/drawing

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

2. Update package cache:

Ubuntu 18.04 user need to manually refresh package cache after adding new software sources:

sudo apt update

3. Install Drawing:

Finally, install the app via command:

sudo apt install drawing

Remove ‘Drawing’:

To remove the image editing tool, use command:

sudo apt remove --autoremove drawing

And remove the Ubuntu PPA either by running command in terminal:

sudo add-apt-repository ppa:cartes/drawing

or use the ‘Software & Updates’ utility under Other Software tab.

In Howtos image editor

How to Install Kernel 5.13 in Ubuntu 18.04 from the 20.04 Repository

Last updated: March 25, 2022

For those sticking to the old Ubuntu 18.04, but need higher Linux kernel version for specific hardware support, here’s how to install the Linux Kernel 5.13 from Ubuntu 20.04 repository.

NOTE: Ubuntu 20.04’s kernel package does install and seems running good in Ubuntu 18.04. But I’m not sure if it will cause compatibility issues. Install it ONLY that you do require it, and use it at your own risk!!

Linux Kernel 5.13 features include:

Initial and early support for Apple M1.
New “Landlock” Linux security module.
Initial graphics support for Alder Lake S.
AMD FreeSync HDMI support.
New Intel cooling driver
Realtek RTL8156 and RTL8153D support
New drivers support for Amazon’s Luna game controller.
Apple Magic Mouse 2 support .
Realtek RT1019, RT1316, RT711 and RT715 support.

Install Linux Kernel 5.13 in Ubuntu 18.04:

You know, the Mainline Kernel PPA maintains the latest kernel package. However, it’s now built against the most recent Ubuntu libc6 library.

The Kernel package from Ubuntu 20.04 repository could be the only way to get recent Kernels for Ubuntu 18.04, except for building by yourself.

1. Add Ubuntu 20.04 Updates repository:

Firstly, press Ctrl+Alt+T on keyboard to open terminal. When it opens, paste the command below and hit enter:

sudo sh -c 'echo "deb http://archive.ubuntu.com/ubuntu focal-updates main" >> /etc/apt/sources.list'

The command adds focal-updates repository to your system software sources.

2. Set lower priority for the repository:

Also in terminal window, run command to create and open a config file via Gedit text editor:

sudo gedit /etc/apt/preferences.d/99focal-updates

When the file opens, add following lines and save it:

Package: *
Pin: release a=focal-updates
Pin-Priority: 1

After that, your system will not automatically install updates from this repository, unless you do it manually.

3. Update package cache:

Before being able to install packages from that repository, refresh system cache via command:

sudo apt update

If you’re following this tutorial on 18.04 based system that missing GPG key, run the commands below one by one to get them:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 871920D1991BC93C

4. Install Kernel 5.13:

Finally install the 20.04’s kernel package via the command below. So far, it’s Kernel 5.13.

sudo apt install linux-generic-hwe-20.04

After installation, restart your PC and verify via command:

uname -a

How to Remove Kernel 5.13 from Ubuntu 18.04:

To remove the focal-updates repository, run command to edit software sources file:

sudo gedit /etc/apt/sources.list

When the file opens, remove or comment (add # at the beginning) the line of:

deb http://archive.ubuntu.com/ubuntu focal-updates main

After saved it, run sudo apt update to refresh the cache.

To remove Linux Kernel 5.13, you need to firstly restart and select boot with an old kernel (v5.4.x) from boot menu -> Advanced options.

Once you get into Ubuntu 18.04 with the previous Kernel, run the command below to remove Kernel 5.13:

sudo apt remove linux-image-5.13.0-37-generic linux-headers-5.13.0-37-generic linux-hwe-5.13-headers-5.13.0-37

NOTE: Ubuntu updates the kernel packages regularly, the package version may be different!! Change it to the one that you installed.

In Howtos kernel

GNOME 42 Released! See What’s New in the Desktop of Ubuntu 22.04

Last updated: March 24, 2022

GNOME 42 is out! The upcoming Ubuntu 22.04 LTS will take use it as the default desktop environment.

If you’ve tried out the latest update of Ubuntu 22.04 development build, you should already see the brand new appearance of the GNOME desktop.

It introduced the new ‘Appearance‘ settings page, with options to switch between Dark and Light mode. As well, each wallpaper has both dark and light editions that changes automatically.

GNOME 42 Appearance Settings

Ubuntu has ‘Appearance’ settings page for a few years. In Ubuntu 22.04, the page has been modified. While wallpaper selection is available in ‘Background’ tab, it provides light/dark switch along with new accent color, desktop icons, and dock settings.

Ubuntu 22.04 Appearance Settings Page

The Gnome Screenshot app has been replaced with the desktop’s built-in screenshot UI. Just press ‘Print Screen‘ on keyboard to bring up the UI. Then, you may take a screenshot of selection area, app window, or full-screen. It as well has ability to record your desktop or selection area.

The UI supports keyboard shortcuts. However, it won’t work once you changed the trigger from ‘Print Screen’ to another.

V – switch between screen capture and recorder mode.
s – selection area.
c – full-screen.
w – app window.
Enter / Space / Ctrl+C – capture

Gnome New Screenshot UI

Many apps has been ported to GTK4 + libadwaita, but Ubuntu 22.04 is said to avoid GTK4 due to theme issue. You’ll see some apps has 4 corners rounded (e.g., Files and Image Viewer) which are GTK4. While, others are GTK3 apps that have sharp bottom corners.

GNOME 42 introduced 2 new defaults apps: Gnome Text Editor and Gnome Console. The latter is really my favorite. However, Ubuntu 22.04 still uses Gedit and Gnome Terminal at the moment!

2 New Default Apps in GNOME 42

And, GNOME finally uses Microsoft’s RDP protocal to provide remote desktop service, which is more secure that the VNC connection. User may get the settings in ‘Sharing’ tab in Gnome Control Center.

Other changes in GNOME 42 include:

Videos player (Totem) and Gnome web have hardware accelerated support.
Improved file indexing and full-screen app handling to reduce energy consumption.
significantly enhanced input handling.

Get GNOME 42:

If you’re an Ubuntu user, I would recommend to try out Ubuntu 22.04 daily build ISO or just wait for the final release. Or, you may try the GNOME OS Nightly.

In Howtos Gnome

How to Install KeePassXC 2.7.10 in Ubuntu 24.04 | 22.04

Last updated: March 7, 2025

This tutorial shows how to install the latest version of KeePassXC password manager (v2.7.10 so far) and keep it up-to-date in Ubuntu 24.04, Ubuntu 22.04, and Ubuntu 20.04

The popular KeePassXC password manager now is at 2.7.0 release series with many exciting new features. Here’s are some of them according to the release note:

Entry tagging
Unlock via Windows Hello and macOS Touch ID
Auto-Type overhaul.
Improvements to Secret Service integration (Linux)
Change the crypto backend from libgcrypt to Botan

KeePass 2.7 Entry tags

To get the most recent KeePass in Ubuntu, you have 4 choices:

Snap package – runs in sandbox environment.
AppImage – no installation required. Just run to launch the app.
Ubuntu PPA – contains native .deb package.
Flatpak package – runs in sandbox environment.

All of them are official! Choose one that you prefer.

Option 1: KeePassXC Snap package

Snap is the easiest way to install the app in Ubuntu, however, it runs in sandbox and so far it’s a bit lag behind. The snap is at v2.7.8 while the latest has reached v2.7.9.

To install it, just launch App Center (or Ubuntu Software), then search and click install KeePassXC filtered by Snap package.

Or, press Ctrl+Alt+T on keyboard to open terminal, and run command to install the package:

sudo snap install keepassxc

Snap package installs updates automatically, though you may run the command below to check updates manually:

sudo snap refresh keepassxc

Option 2: KeePassXC AppImage package

The software website provides Linux package via AppImage. It’s available to download via the link button below:

Download KeePassXC AppImage

No installation required, after downloaded the AppImage, just go to its ‘Properties’ dialog, enable “Executable as Program” permission. Finally, click Run will launch the password manager.

NOTE: Ubuntu 22.04 and higher does NOT support AppImage out-of-the-box, due to miss libfuse2 library. Open terminal (Ctrl+Alt+T) and run command to get it:

sudo apt install libfuse2

Option 3: Install KeePassXC via Ubuntu PPA

For native .deb package, the official PPA contains the package for Ubuntu 20.04, Ubuntu 22.04, Ubuntu 24.04. So far, it supports amd64, arm64, armhf, and riscv64 CPU architecture types.

1. Add the PPA

Firstly, press Ctrl+Alt+T on keyboard to open terminal window. When it opens, paste the command below and hit Enter to add PPA:

sudo add-apt-repository ppa:phoerious/keepassxc

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

2. Update package cache.

Ubuntu now automatically refresh package cache while adding PPA, but some Ubuntu based systems (e.g., Linux Mint) does NOT.

To manually refresh system package cache, run command:

sudo apt update

3. Install / upgrade KeePassXC

Finally, install the password manager by running command in terminal:

sudo apt install keepassxc

If you already have an old version of the package installed, then just launch “Software Updater” to check and install updates.

Option 4: Install KeePassXC via Flatpak package

Flatpak is another universal Linux package format that runs in sandbox. KeePassXC is available to install as Flatpak package through the Flathub repository. So far, it supports code>amd64, arm64 CPU architecture types.

For Linux Mint 21/22, and Fedora Workstation (with 3rd party repository enabled), simply search for and install the package from either Software Manager or GNOME Software.

While Ubuntu and other Linux can install the package by following steps below one by one:

First, open terminal (Ctrl+Alt+T) and run command to enable Flatpak support:
```
sudo apt install flatpak
```
Old Ubuntu 18.04 user may need to add this PPA first for most recent daemon package.
Then, add the Flathub repository which hosts the software package:
```
flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
```
For other Linux, follow the official setup guide to enable Flatpak support.
Finally, run command to install the password manager as Flatpak package:
```
flatpak install flathub org.keepassxc.KeePassXC
```
As it runs in sandbox, it also needs lots of downloads for run-time libraries as the screenshot below shows you.

After installed the package, search for and launch the app from either start menu or GNOME overview depends on your desktop.

If app icon not visible, try either log out and back in, or run the command below instead to launch it:

flatpak run org.keepassxc.KeePassXC

And, to check updates for the Flatpak package, use command:

flatpak update org.keepassxc.KeePassXC

Uninstall KeePassXC:

For any reason, you may remove the password manager by running one of the commands below in terminal:

To remove the snap package, either use App Center (or Ubuntu Software) or run command in terminal:
```
sudo snap remove --purge keepassxc
```

To remove the native .deb package, use command:

sudo apt remove --autoremove keepassxc

And, remove the Ubuntu PPA by using command:

sudo add-apt-repository --remove ppa:phoerious/keepassxc

For the Flatpak package, use the command below instead to uninstall:
```
flatpak uninstall --delete-data org.keepassxc.KeePassXC
```
Also run flatpak uninstall --unused to clear useless runtime libraries.

In Howtos password

How to Show/Hide Trash Icon in Ubuntu 22.04 Desktop

Last updated: March 22, 2022

Ubuntu 22.04 finally merged desktop icon settings into System Settings (Gnome Control Center). However, it only provides few options to toggle display ‘Home’ folder, change icon size and new icon position.

By right-clicking on desktop and select ‘Desktop Icons Settings’ from pop-up menu, it will bring up the ‘Appearance‘ settings page as the picture below shows:

Ubuntu 22.04 only provides few Desktop Icons options

What if you want to show the trash can, removable devices (e.g., USB drive) on desktop? They are hidden settings! Here I’m going to show you how to configure them in Ubuntu 22.04.

Single Command to Toggle Display Trash Icon on Desktop

The gsettings command is always the most efficient way to configure hidden settings in Ubuntu.

If you’re OK with Linux commands, press Ctrl+Alt+T on keyboard to open terminal and paste the command below into it.

gsettings set org.gnome.shell.extensions.ding show-trash true

By hitting enter, you should see the trash can desktop icon immediately!

To hide the icon again, simply run the command below to reset the key:

gsettings reset org.gnome.shell.extensions.ding show-trash

In addition, you may hide the Trash icon from left dock via command:

gsettings set org.gnome.shell.extensions.dash-to-dock show-trash false

Use Dconf Editor to toggle display Trash icon & more Desktop Icons Settings:

The ‘Dconf Editor‘ tool provides a graphical interface to configure these hidden settings in Ubuntu.

1.) Firstly, search for and install Dconf Editor in Ubuntu Software.

Ubuntu Software always sucks! It does not launch in my case at the moment of writing this tutorial. So, there’s no screenshot for it.

You may also run the command below in terminal to install the ‘Dconf Editor’ tool.

sudo apt install dconf-editor

2.) Search for and launch the tool from ‘Activities’ overview screen:

3.) When the app opens, navigate to org/gnome/shell/extensions/ding. Scroll down, and you’ll see the on/off switch for the ‘show-trash’ key, as well as many other settings for desktop icons.

That’s all. Enjoy!

In Howtos Gnome

How to Change the Default Terminal Emulator in Ubuntu 24.04 | 22.04

Last updated: April 1, 2025

This simple tutorial shows how to change the default terminal emulator from Gnome Terminal to the one that you prefer in Ubuntu 24.04, Ubuntu 22.04, Ubuntu 20.04.

The default Gnome Terminal is great, but there are many good alternatives (e.g., tilix). If you prefer to use another one and want to set it as default, so you may press Ctrl+Alt+T to open it.

UPDATE 2025: for Ubuntu 25.04, there’s new xdg-terminal-exec to do the job.

Step 1: Create symbolic link to x-terminal-emulator

Ubuntu so far defaults to x-terminal-emulator, which is a virtual package by default links to Gnome Terminal.

By creating a group of alternatives to the package allows to switch which one to use at any time with a single command.

Firstly, open terminal and run command to create a symbolic link (replace /usr/bin/tilix with your terminal emulator):

sudo update-alternatives --install /usr/bin/x-terminal-emulator x-terminal-emulator /usr/bin/tilix 1

Some terminal emulators may already created the symbolic link automatically after installation, so you can just skip this step.

Step 2: Select your terminal to use as default:

Next, run the command below will output all available alternatives:

sudo update-alternatives --config x-terminal-emulator

Type the number for the one that you prefer and hit Enter will set it as default terminal.

In the case, I selected 5: ‘/usr/bin/tilix.wrapper’. It’s a Tilix wrapper with command line arguments that created automatically during installation. Step 1,

Restore and remove the alternative link:

To revert back to Gnome Terminal, just re-run the command in Step 2 and choose number 0 or 1.

And to remove the link created via Step 1, use command (replace ‘/usr/bin/tilix’ accordingly):

sudo update-alternatives --remove x-terminal-emulator /usr/bin/tilix

That’s all. Enjoy!

In Howtos terminal

Linux kernel 5.17 Released! How to Install it in Ubuntu 22.04

Last updated: March 21, 2022

Linux Kernel 5.17 was finally released last night after 8 release candidates. Linus Torvalds announced that:

So we had an extra week of at the end of this release cycle, and I’m happy to report that it was very calm indeed. We could probably have skipped it with not a lot of downside, but we did get a few last-minute reverts and fixes in and avoid some brown-paper bugs that would otherwise have been stable fodder, so it’s all good.

The new kernel comes with

New AMD P-State driver for Zen 2 and newer systems with ACPI CPPC.
RISC-V sv48 Support to be able to handle more memory.
Sensor monitoring support for more ASUS motherboards.
CXL memory hotplug support.
Initial support for next-generation Raptor Lake S graphics.
Initial support for a Sierra XM1210 receiver.
Intel Alder Lake N audio support.
Real-Time clock driver for Nintendo GameCube / Wii / Wii U.

How to Install Kernel 5.17 in Ubuntu 22.04:

IMPORTANT: The Mainline Kernel packages do not include any Ubuntu-provided drivers or patches! You must know what you’re going to do!

The Mainline Kernel PPA has built the new kernel packages. It however requires libc >= 2.34 and libssl3. Which means only Ubuntu 22.04 user can try out the new Kernel packages. Though, Ubuntu 21.10 may try to meet the requirement via this tutorial.

Firstly, download the .deb packages from the link page below:

Download Kernel 5.17

For modern 64-bit PC/laptop, download & install the packages below in turns:

linux-headers-5.17.0-051700_5.17.0-051700.202203202130_all.deb
linux-headers-5.17.0-051700-generic_5.17.0-051700.202203202130_amd64.deb
linux-modules-5.17.0-051700-generic_5.17.0-051700.202203202130_amd64.deb
linux-image-unsigned-5.17.0-051700-generic_5.17.0-051700.202203202130_amd64.deb

To make things easier, there’s a graphical tool called Mainline that allows to download & install mainline Kernels with few clicks.

And for Ubuntu 20.04 user insist on installing the new Kernel, keep an eye on this Ubuntu PPA (use it at your own risk)!

How to Remove Kernel 5.17:

Firstly, start or restart your PC and select an old kernel to boot from Grub boot-loader. After login with old Kernel, remove Kernel 5.17 via command:

sudo apt remove linux-headers-5.17.0* linux-modules-5.17.0* linux-image-unsigned-5.17.0*

In Howtos kernel

GTK Twitter App Cawbird 1.5 Released! Add Option to Reload Failed Image

Last updated: March 20, 2022

Cawbird, the free open-source native Linux Twitter app, released version 1.5 few days ago.

There’s no big ones in the release. But if you have poor network connection like me, and any image failed to load in Cawbird, there’s now ‘reload image‘ button that could help to reload it.

The new release now cleanly and clearly handle “withheld” accounts, and hide withheld tweets. And, it fixed emoji chooser in non-English locales, added support paging of blocked profiles. For more, see the Github releases page.

How to install Cawbird in Ubuntu & Other Linux:

Cawbird twitter app is available to install via 3 ways: Native DEB/RPM, Snap, and Flatpak packages.

1. Native DEB / RPM

For Debian, Ubuntu, and Fedora based systems, the software developer offers official packages through OBS repository:

Download Cawbird

Just select your OS logo, click ‘Grab binary packages directory‘ and select download the native package for your system (amd64 for modern PC, arm64/armhf for arm processors).