In Ubuntu Gnome desktop when you press and hold the Super key and hit a number (1, 2, 3, 4, etc.) on keyboard will launch (or switch to) relevant application window from the left dock launcher.
And this quick tutorial is going to show you how to disable this Super hot-keys in Ubuntu 18.04 and higher.
1. First open Dconf Editor from application menu. Install it via Ubuntu Software if not installed.
The open-source music notation software MuseScore 3.1 was released today with new features and significant improvements. Here’s how to install it in Ubuntu.
Ignificant improvements to automatic placement and layout
Automatic placement no longer prevent user from moving elements
Fretboard diagrams improvements including:
Multiple dots per string
Partial and multiple barres
Different dot shapes (especially useful for Ted Greene diagrams)
Ability to not show nut
Customizable distance between strings and frets
Chord symbols for diagrams
New commands Edit > Paste Half Duration and Edit > Paste Double Duration
New command Tools > Unroll Repeats
How to Install MuseScore 3.1 in Ubuntu:
Appimage:
For non-install, single executable appimage, it’s available at the link below:
Right-click the Appimage, go to Properties -> Permissions -> tick the box says ‘Allow executing file as program’, finally run it to launch MuseScore 3.1:
Install MuseScore via PPA:
The official MuseScore3 PPA maintains the latest packages for Ubuntu 18.04, Ubuntu 18.10, Ubuntu 19.04, and derivatives.
The 3.1 release package will usually available in 2 or 3 days.
1. Open terminal either via Ctrl+Alt+T keyboard shortcut or by searching for ‘terminal’ from application menu. When it opens, run command to add the PPA:
KTorrent, full-featured BitTorrent application by KDE, now is officially available as Snap package. Which means you can now easily install the latest KTorrent in Ubuntu 16.04, Ubuntu 18.04, and higher, and keep it always updated.
KTorrent features:
Queuing of torrents
Previewing of certain file types, build in (video and audio)
Importing of partially or fully downloaded files
File prioritization for multi-file torrents
Selective downloading for multi-file torrents
Kick/ban peers with an additional IP Filter dialog for list/edit purposes
UDP tracker support
Support for private trackers and torrents
Support for µTorrent’s peer exchange
Support for protocol encryption (compatible with Azureus)
Support for creating trackerless torrents
Support for distributed hash tables (DHT, the Mainline version)
Support for UPnP to automatically forward ports on a LAN with dynamic assigned hosts
Support for webseeds
Scripting support via Kross, and interprocess control via D-Bus interface
Tracker authentication support
Connection through a proxy
How to Install KTorrent Snap in Ubuntu 18.04 & Higher:
Open Ubuntu Software and search for ktorrent. There will be two packages available:
KTorrent snap maintained by KDE.
Stock KTorrent package offered by Ubuntu.
For Ubuntu 16.04, run following command in terminal (Ctrl+Alt+T) to install snapd first.
sudo apt-get install snapd
Then install the KTorrent snap package via command (it’s in --candidate channel at the moment):
snap install ktorrent --candidate
The snap package co-exists with stock Ubuntu package, you’ll see two KTorrent icons in application menu if both installed.
(Optional) To remove the snap package, run command in terminal:
Initial support for installing Plug and Play drivers.
Support for building 16-bit modules in PE format.
A lot of code moved to the new KernelBase DLL.
Various game controller fixes.
Use higher performance system clocks if available.
Various bug fixes.
How to Install Wine 4.9 in Ubuntu:
1. Open terminal either via Ctrl+Alt+T keyboard shortcut or by searching for ‘terminal’ from app menu. When it opens, run following commands to download and install the key:
Many popular applications (e.g., PyCharm, Blender and even Firefox) provide Linux tarball that include executable files can be run directly to launch the apps.
However, we need to manually create app launcher, to make it possible to launch them by searching the apps from start menu (‘Activities‘ overview). And, ‘Arronax’ is the app to do the job easily.
The .desktop files
App launchers in Linux are handled by files via .desktop extension. Each app you can see in system start menu has an associated .desktop file in either ‘/usr/share/applications‘ or ‘.local/share/applications‘ directory.
For portable Linux tarball, or appimage that does not have an app launcher, user may manually create a .desktop file in either directory to link app into system start menu.
Arronax:
KDE, Cinnamon, and XFCE now have built-in utility to create desktop app launcher. But, GNOME does not!
Arronax is the simple tool started almost 10 years ago, with ability to create and edit .desktop file.
With it, user may either right-click on the executable file and select ‘Create a Starter’, or open the app by searching from start menu (‘Activities’ overview):
For basic function, just type name to display in start menu, select executable file for ‘Command’ box, and choose an icon! Save it to the right location, and that’s all!!
All other options are optional! Though, you may move cursor over an option to get tool-tip tells what it does, and enable it as need.
Finally, click on “Save” button. In the bottom of file save dialog, user may choose the standard location to save the .desktop file.
“User app folder” – stores app launcher files for current user only.
“System app folder” – stores app launcher files for all system user.
“User / System Autostart folder” – store app launchers start automatically on start up.
NOTE: save to system folder needs to run Arronax as root (run sudo arronax in terminal).
How to Install Arronax in Ubuntu:
The app is available to install via an official PPA for all current Ubuntu releases, including Ubuntu 18.04, Ubuntu 20.04, Ubuntu 21.10, and Ubuntu 22.04.
1. Firstly, open terminal (Ctrl+Alt+T) and run command to add the software PPA:
sudo add-apt-repository ppa:diesch/stable
Type user password (no asterisk feedback) when it prompts and hit Enter to continue.
UPDATE for Ubuntu 23.10: the app seems to be no longer updated! If you do need it, run command to add this unofficial PPA instead of 23.10.
ICQ, the popular chat application, is available for Linux as an official Snap package.
ICQ is a cross-platform instant messaging and VoIP client that features:
securely encrypted calls
high-quality video calls
speech-to-text for voice messages
ability to create your own stickers
animated 3D masks and video calls
groups and channels
chat synchronization across all devices
Image via twitter.com/snapcraftio
To install ICQ Snap in Ubuntu 18.04 and higher:
Simply open Ubuntu Software, search for and install the ICQ package (it’s beta at the moment):
To install ICQ snap in Ubuntu 16.04:
Ubuntu 16.04 can install the snap package after installed the snapd daemon.
Open terminal either via Ctrl+Alt+T keyboard shortcut or by searching for ‘terminal’ from application menu. When it opens, run command to install snapd:
sudo apt-get install snapd
Type user password (no asterisk feedback) when it asks and hit Enter to continue.
Then install ICQ snap package via command:
sudo snap install icq-im --beta
(Optional) To uninstall the snap package, run command:
Full featured LaTeX editor TexStudio 2.12.16 was released a few hours ago. Here’s how to install it in Ubuntu 16.04, Ubuntu 18.04, Ubuntu 18.10, Ubuntu 19.04, and their derivatives.
TexStudio 2.12.16 is a small release with only bug-fixex, including some fixes for tool-tip preview by MeanSquaredError.
How to Install TexStudio 2.12.16 in Ubuntu:
There’s a PPA repository that contains the latest packages for all current Ubuntu releases and derivatives.
1. Open terminal either via Ctrl+Alt+T keyboard shortcut or by searching for ‘terminal’ from software launcher. When it opens, run command:
sudo add-apt-repository ppa:sunderme/texstudio
Type user password (no asterisk feedback) from sudo prompt and hit Enter to add the PPA.
2. If an old version was installed in your system, remove the texstudio-doc, texstudio-l10n (if any) package before upgrading the software:
sudo apt-get remove texstudio-doc texstudio-l10n
3. After adding the PPA, you can either upgrade the editor via Software Updater:
or run commands in terminal to install or upgrade the software:
Ubuntu 18.04 is quite slow to boot up in my laptop in the last few days. It was stuck at the purple screen with Ubuntu logo in center for more than 1 minute before booting into the login screen.
When it was booting into the purple screen, press F2 to show the white and black text screen. There it told me that it was stuck at:
“A start job is running for dev-disk-by\x2uuid …(35s \ 1min 30s)”
To fix the problem, do following steps one by one:
UPDATE: First make a back up of /etc/fstab before editing the file by running command:
sudo cp /etc/fstab /etc/fstab-backup
1. Open terminal from application menu or by pressing Ctrl+Alt+T on keyboard. When it opens, run command:
sudo -H gedit /etc/fstab
Type user password (no asterisk feedback) when it prompts. It will open fstab (file system table) configuration file with gedit text editor.
2. When the file opens, you’ll see something look like this:
As the top picture shows, “UUID=1cdb9a5b-01a7-4b7b-a0ad-ce73676bb7c1”, mounting the Swap partition takes 1 minute and 30 seconds to boot up Ubuntu.
3. Launch Disks utility from application menu.
4. When it opens, check the Swap partition, and it obviously that the UUID value does not match the one in /etc/fstab.
5. So what I need to do here is to replace the UUID value with the correct one copied from Disks utility.
