Archives For Howtos

Luminance HDR

Luminance HDR 2.6.1, free and open-source HDR imaging software, is available to install in Ubuntu 20.04, Ubuntu 20.10, Linux Mint 20.

Before it’s officially announced the new release source tarball now is available to download. And Luminance HDR 2.6.1 is a bug-fix release the features:

  • Better UI for last step of HdrWizard
  • Fix highlights glitch
  • Fix save/load response cure even from the command line
  • Fix scrolling of progress area in BatchHDR
  • Some other bug-fixes and translation updates.

How to Install Luminance HDR via Ubuntu PPA:

The Dariusz Duma’s PPA was maintaining the software package. It however seems not being updated except for auto-build packages.

For those sticking to an Ubuntu PPA, there’s an alternative unofficial PPA available and you can run following steps one by one to get it in your Ubuntu.

1.) Open terminal from system application menu and run command to add the PPA:

sudo add-apt-repository ppa:ubuntuhandbook1/apps

2.) Then install the HDR creator via command:

sudo apt install luminance-hdr

Uninstall:

To remove the software package, simply run command:

sudo apt remove --autoremove luminance-hdr

And to remove the Ubuntu PPA, open Software & Updates navigate to Other Software tab and remove the relevant line.

The Python programming language 3.10 is now in development. For testing purpose you can install the alpha release via PPA in Ubuntu 20.04, Ubuntu 18.04, Ubuntu 16.04, Linux Mint 19.x/20, and derivatives.

Many new features for Python 3.10 are still being planned and written. Among the new major features and changes so far:

  • Remove wstr from Unicode
  • Allow writing union types as X | Y
  • Parameter Specification Variables
  • Precise line numbers for debugging and other tools.
  • from __future__ import annotations is now the default.
  • Add Optional Length-Checking To zip.

Install Python 3.10 Alpha via PPA:

So far, it’s Python 3.10 a4 the fourth of six planned alpha releases, which is available to install via this Ubuntu PPA.

1.) Open terminal from system application menu, and run command to add the PPA:

sudo add-apt-repository ppa:deadsnakes/ppa

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

2.) Then refresh system package via command:

sudo apt update

3.) Finally install Python 3.10 via command:

sudo apt install python3.10

Once installed, check via python3.10 --version command or just run python3.10 to access the IDE in terminal.

Uninstall Python 3.10:

To remove the programming language, run command:

sudo apt remove --autoremove python3.10

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

Looking for detailed information about a software package, e.g., maintainer, dependencies, sources, installed size, etc?

There are a few tools to tell the information of software packages in classic .deb format in Ubuntu Linux. And here I’m going to show you one by one.

1. apt show command:

For all packages in system apt repositories (including enabled PPAs) and manually installed .deb packages, apt show command will output the information about:

  • Package version
  • Maintainer
  • Installed-sized
  • Package dependencies
  • Apt-sources: where the package was installed from, or which source offers the package.
  • And a brief description about the software package.

For example, apt show gnome-feeds command will output something as the picture shows.

If you downloaded the deb binary and installed it manually, there will a line says ‘APT-Manual-Installed: yes‘.

2. Check package details via Synaptic Package Manager

The Synaptic Package Manager offers “Properties” button. After searching for and selecting a software package, you’re able to check details via that button.

Different to apt show command, Synaptic shows both the libraries that the software package depends on and the system packages that depends this package.

As well, it lists all the files the package will install (or installed).

To install Synaptic Package Manager, run command in terminal:

sudo apt install synaptic

3. Gdebi Package Installer

If you just grab a deb package from the web, and want to check all included files and if all dependencies are satisfied, then Gdebi Package Installer is recommended for you.

And the tool can be installed via command:

sudo apt install gdebi

4. Uncompress Deb and check details.

Also for the manually downloaded deb package, you can either open it via “Archive Manager” or extract it.

Usually you’ll see data.tar.xz which includes all files to be installed, and control.tar.xz includes a few scripts to run before/after installing or removing the deb. And there’s a document file called “control” that includes some information about the deb.

Gnome Feeds, a free and open-source news reader with a neat user interface, now is available to install via Ubuntu PPA for those prefer the classic apt method.

Gnome Feeds is a GTK+3 application written in Python 3. It features a simple responsive user interface based on Purism’s libhandy library. Feeds can be added via URL address and support importing and exporting large feed collection from and to OPML.

The software has been made into main repositories since Ubuntu 20.10 Groovy. For request, I’ve uploaded the latest packages into the unofficial PPA for Ubuntu 20.04, Linux Mint 20, and Ubuntu 20.10, with Ubuntu 18.04 excluded as libhandy requires at least GTK 3.24.

NOTE: It’s recommended to install the official Flatpak package, while the PPA offers unofficial .deb binary package for choice.

1.) Open terminal from your system application launcher, then run command to add the PPA:

sudo add-apt-repository ppa:ubuntuhandbook1/gfeeds

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

2.) While adding PPA will automatically refresh the system package cache, you can then install the feed reader via command:

sudo apt install gnome-feeds

Once installed, launch it from system application launcher and enjoy!

Uninstall Gnome Feeds:

To remove the feed reader, simply run command in terminal:

sudo apt remove --autoremove gnome-feeds

And remove the PPA either using Software & Updates utility under Other Software tab, or run command:

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

This simple tutorial shows how to install VeraCrypt and create encrypted hard drive, USB stick in Ubuntu 20.04, Ubuntu 18.04, Linux Mint 20, Ubuntu 20.10.

VeraCrypt is a free and open-source disk encryption software based on TrueCrypt 7.1a. It works on Linux, Windows, and Mac OS.

With VeraCrypt, you can:

  • Creates a virtual encrypted disk within a file and mounts it as a real disk.
  • Encrypts an entire partition or storage device such as USB flash drive or hard drive.
  • Encrypts a partition or drive where Windows is installed.

How to Install VeraCrypt in Ubuntu via PPA:

The software offers official 64-bit .deb binaries for all current Ubuntu releases.

For arm64, armhf, ppc64el packages, there’s an unofficial PPA maintained by the administrator of “XUbuntu Developers” team.

1.) To add the PPA, open terminal from system application launcher and run command:

sudo add-apt-repository ppa:unit193/encryption

2.) Then refresh system package cache and install the encryption software via commands:

sudo apt update

sudo apt install veracrypt

How to Create an Encrypted Disk via VeraCrypt:

Once installed the software, open it from system application launcher. Then click on the “Create Volume” button to start creating an encrypted disk.

Then either select “Create an encrypted file container” for a virtual encrypted disk within a file, or “Create a volume within a partition/drive” to encrypt non-system partition, external hard drive, or entire USB stick.

Then follow the setup wizard to choose volume type, encryption algorithm, volume password, file system type, and finally click “Format”.

When everything’s done, mount the volume and you’ll be able to access it via Nautilus file browser.

For more, read the official Documentation.

Uninstall:

To remove VeraCrypt, simply run command in terminal:

sudo apt remove --autoremove veracrypt

To remove the Ubuntu PPA, run command:

sudo add-apt-repository --remove ppa:unit193/encryption