Archives For Howtos

KeePassX 2 YubiKey support

KeePassXC password manager 2.5.3 was released today with stability improvements and new feature: browser extension for Chromium-based Edge browser.

KeePassXC 2.5.3 changelog:

  • Fix possible database lockout when removing a YubiKey from a KDBX 3.1 database
  • Fix crash if Auto-Type is performed on a new entry
  • Fix crash when all entries are deleted from a group
  • Improve the reliability of clipboard clearing on Gnome
  • Do not check cmd:// URLs for valid URL syntax anymore
  • Prevent unnecessary merges for databases on network shares
  • Browser: Prevent native messaging proxy from blocking application shutdown
  • Browser: Improve website URL matching

How to Install KeePassXC 2.5.3 in Ubuntu:

For Ubuntu 18.04 and higher, KeePassXC Snap package (runs in sandbox) can be easily installed via Ubuntu Software.

For those prefer native Ubuntu .deb package, open terminal from application menu or press Ctrl+Alt+T on keyboard, and run following commands one by one:

1.) Run command to add the official PPA, which so far supports for Ubuntu 16.04, Ubuntu 18.04, Ubuntu 19.04, and Ubuntu 19.10.

sudo add-apt-repository ppa:phoerious/keepassxc

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

2. Then upgrade KeePassXC from previous release via Software Updater:

or run commands one by one in terminal to install the password manager:

sudo apt update

sudo apt install keepassxc

Uninstall:

To remove the PPA, open Software & Updates and navigate to Other Software tab.

To remove KeePassXC .deb package, run command in terminal:

sudo apt-get remove --autoremove keepassxc

This simple tutorial shows how to install VokoscreenNG, Vokoscreen rewritten from scratch, in Ubuntu 18.04, Ubuntu 19.10.

While the old Vokoscreen 2.5 with ffmpeg will not receive further updates, the open-source screencaster for Linux and Windows now has a new name VokoscreenNG, which is based of Qt and GStreamer and was rewritten from scratch.

VokoscreenNG has been made into main repositories of Ubuntu 20.04 LTS. And the snap package (runs in sandbox) is coming soon.

The unofficial backports for Ubuntu 18.04 and Ubuntu 19.10 has been made into PPA repository. And you can do following steps one by one to install it:

1.) Open terminal either by pressing Ctrl+Alt+T on keyboard, or by searching for ‘terminal’ from application menu.

When terminal opens, run commands to add the PPA:

sudo add-apt-repository ppa:ubuntuhandbook1/apps

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

2.) Then install the screen recording application via command:

sudo apt update && sudo apt install vokoscreen-ng

Once installed, open the software from your system application launcher and enjoy!

3.) (Optional) As the PPA contains many other software packages, you may remove it either by going to Software & Updates -> Other Software tab, or by running command:

sudo add-apt-repository --remove ppa:ubuntuhandbook1/apps

gnome shell

This simple tutorial shows how to remove the focused window’s top bar app menu in Ubuntu 18.04 and (or) Ubuntu 19.10.

Gnome desktop by default has an application menu on top bar, next to “Activities”, for the focused application window. And if you find it useless, like me, here’s how to disable or remove the menu.

1.) For Ubuntu 18.04, simply search for and install Gnome Tweaks in Ubuntu Software.

And there’s an option to disable the top bar app menu in the “Top Bar” pane of Gnome Tweaks utility.

2.) For Ubuntu 19.10, the Gnome Tweaks option is not available any more. There’s however a Gnome Shell extension can do the job.

Open Ubuntu Software, search for and install Remove App Menu Gnome shell extension.

Though the extension is quite old, it works in my case in Ubuntu 19.10 once installed.

Linux Kernel

The first maintenance release for Oracle Virtualbox 6.1 series was released one day ago.

Virtualbox 6.1.2 added kernel 5.5 support in Linux hosts (guest additions not yet), and improved resize and multi-monitor handling for Linux guests using VMSVGA.

Other changes include:

  • fixed performance issue observed with Windows XP guests on AMD hosts
  • fixed audio input handling when VRDE is enabled
  • fixed use of encrypted disks with snapshots involved
  • improve performance of virtio-scsi
  • and some Windows hosts and guests improvements and fixes.

How to Install Virtualbox 6.1.2 in Ubuntu:

For 64-bit Ubuntu 16.04, Ubuntu 18.04, Ubuntu 19.04, Ubuntu 19.10, and their derivatives, you can either download the official .deb binary from the link below:

Download Virtualbox for Linux

or install VBox from its official apt repository by running following steps:

1. Open terminal (Ctrl+Alt+T), paste below command and run to add the repository:

sudo sh -c 'echo "deb [arch=amd64] https://download.virtualbox.org/virtualbox/debian $(lsb_release -sc) contrib" >> /etc/apt/sources.list.d/virtualbox.list'

For Linux Mint, you HAVE to replace $(lsb_release -sc) in the command with bionic for Mint 19.x, or xenial for Mint 18.x.

2. Then download and install the repository key via command:

wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -

3. Refresh system package cache via command:

sudo apt update

4. Finally install Virtualbox 6.1:

sudo apt install virtualbox-6.1

Uninstall:

To remove it, simply run command in terminal:

sudo apt remove --autoremove virtualbox-6.1

And go to Software & Updates -> Other Software to remove apt repositories.

The open-source LaTeX text editor TeXstudio 2.12.20 was released today as a new bug-fix release for the 2.12 series.

Most notably changes in TeXstudio 2.12.20 include fix bug when replacing highlighted search results, and add \text{} to amsmath.cwl.

How to Install TexStudio 2.12.20 in Ubuntu:

The official PPA has made the new release packages for Ubuntu 16.04, Ubuntu 18.04,
Ubuntu 19.10, Ubuntu 20.04, and their derivatives.

1. Open terminal either by pressing Ctrl+Alt+T on keyboard 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) when it asks 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 it via Software Updater:

or run commands in terminal to install or upgrade the software:

sudo apt-get update && sudo apt-get install texstudio

Uninstall:

To remove the LaTeX editor, run command in terminal:

sudo apt-get remove --autoremove texstudio

And go to Software & Updates -> Other Software to remove PPA repositories.