Archives For Howtos


The RawTherapee RAW file processor has reached the new stable 5.0 release a few days ago. Now it’s available in PPA for Ubuntu 16.04, Ubuntu 16.10, Linux Mint 18, Elementary OS Loki, and derivatives.

RawTherapee 5 supports most raw formats, including some unusual ones like those from cameras using Foveon and X-Trans sensors. If your camera’s raw format is not supported, read ‘Adding Support for New Raw Formats‘.

New Features in RawTherapee 5:

  • Wavelets tool.
  • Retinex tool.
  • Monitor profile and rendering intent support.
  • Print soft-proofing support.
  • Automatic chroma noise reduction, manual luminance noise reduction using sliders and curves.
  • The “Inspect” tab in the File Browser lets you see a 100% preview of the image whose thumbnail your mouse cursor hovers over, which is either the largest JPEG image embedded in the raw file or the image itself when hovering over non-raw images.
  • The curve pipette allows you to pick the right point of a curve by clicking in the preview, and input/output values so that you can set the desired output value for a given input value.
  • Post-resize sharpening, to give your photos that subtle crispness after resizing them.
  • Dual-illuminant DCP support with curves, base tables, look tables and baseline exposure.
  • New exposure tone curve modes “Luminance” and “Perceptual”.
  • Queue processing will stop if an error is encountered while saving, e.g. if you run out of disk space.
  • The Contrast by Detail Levels tool received the “Process Locate Before/After Black-and-White” option.
  • Rec. 2020 ICC profile added.
  • The Navigator can show RGB, HSV and L*a*b* values in a range of 0-255, 0-1 or %.
  • The Lockable Color Picker allows you to place multiple sample points over the preview to measure colors and see them change in real time as you manipulate the image. They support the same ranges as the Navigator.
  • Grayscale JPEG and TIFF images are now supported.
  • 32-bit TIFF files are supported.
  • In addition to these new features, RawTherapee received over two years worth of amazing speedups, code cleanups and bug fixes, making it faster and more stable than ever before!

How to Install RawTherapee 5 in Ubuntu

1. Open terminal (Ctrl+Alt+T) and run command to add the PPA:

sudo add-apt-repository ppa:dhor/myway

Type in password (no visual feedback) when it prompts and hit enter.


2. Then install or upgrade RawTherapee either via Synaptic Package Manager or by running the commands below one by one:

sudo apt update

sudo apt install rawtherapee

For those who don’t want to add PPA, grab the DEB package from here.

Note: you won’t be able to upgrade the software using Software Updater utility since the PPA build miss data and debug files.

How to Restore:

To uninstall RawTherapee 5.0 and restore to the stock versions in Ubuntu main repositories, run command to install ppa-purge and purge the PPA:

sudo apt install ppa-purge && sudo ppa-purge ppa:dhor/myway

Darktable 2.2.2

The open-source photography workflow app and raw developer darktable 2.2.2 was released earlier today.

According to the release note, the color look up table module now includes preset for helmholtz/kohlrausch monochrome. DNG decoder supports reading one more white balance encoding method, some artefacts in the Drakroom preview image has been fixed.

The new release also includes various bug-fixes, documentation and tooltips updates, and base support for following devices:

  • Canon PowerShot SX40 HS (dng)
  • Fujifilm X-E2S
  • Leica D-LUX (Typ 109) (4:3, 3:2, 16:9, 1:1)
  • Leica X2 (dng)
  • Nikon LS-5000 (dng)
  • Nokia Lumia 1020 (dng)
  • Panasonic DMC-GF6 (16:9, 3:2, 1:1)
  • Pentax K-5 (dng)
  • Pentax K-r (dng)
  • Pentax K10D (dng)
  • Sony ILCE-6500

How to Install Darktable 2.2.2 in Ubuntu / Linux Mint

For Ubuntu 16.04, Ubuntu 16.10, Linux Mint 18, and derivatives, the new release can be easily installed via the PPA repository.

1. Launch terminal (Ctrl+Alt+T) and run the following command to add the PPA:

sudo add-apt-repository ppa:pmjdebruijn/darktable-release

Type in your password (no visual feedback) when it asks and hit enter.

Darktable PPA for Xenial

2. To upgrade from a previous, launch Software Updater (or Update Manager) and install the updates:

upgrade darktable

Or simply run commands to install or upgrade the software:

sudo apt update

sudo apt install darktable

How to Restore:

You can easily restore the Darktable installation to the stock version available in Ubuntu main repository archive via ppa-purge tool, simply run command:

sudo apt install ppa-purge && sudo ppa-purge ppa:pmjdebruijn/darktable-release


RSS Guard, a simple, light RSS and ATOM feed reader, has reached the 3.3.7 release with new features and some fixes.

According to the release note, the open-source Qt feed reader RSS Guard 3.3.7 features:

  • support custom user skins
  • option to switch on/off DB transactions
  • require MySQL >= 5.5
  • MySQL database backend now requires at least version 5.5
  • Size of attachment image is now configurable
  • All textual contents now locally saved in explicit UTF-8 encoding.
  • updated localizations and some fixes.

RSS Guard user custom skin

How to Install RSS Guard 3.3.7 in Ubuntu 16.04, 16.10:

The GetDeb repository has built the new release for Ubuntu 16.04, Ubuntu 16.10, and their derivatives.

Open terminal (Ctrl+Alt+T) and run following commands to add the PPA and install RSS Guard news reader:

1. Paste the command below in terminal and hit Enter to add the repository:

sudo sh -c 'echo "deb xenial-getdeb apps" >> /etc/apt/sources.list.d/getdeb.list'

You may replace the code name xenial (Ubuntu 16.04) with yakkety for Ubuntu 16.10.

Then setup the key via command:

wget -q -O - | sudo apt-key add -

GetDeb repository for Ubuntu 16.04

2. After that, either search for and install rssguard via Synaptic Package Manager, or run the commands below in terminal:

sudo apt update

sudo apt install rssguard


To uninstall the software, either use Synaptic Package Manager or run the apt remove command with sudo privilege:

sudo apt remove rssguard && sudo apt autoremove

And you can remove the GetDeb repository via Software & Updates utility under Other Software tab.

Wine Stable

After more than a year of development, Wine 2.0 stable was finally released a few hours ago. Here’s how to install it via PPA in Ubuntu 16.10, Ubuntu 16.04, Ubuntu 14.04, and derivatives.

Wine 2.0 release highlights:

  • support for Microsoft Office 2013
  • the 64-bit support on macOS.
  • support for Unicode 9.0
  • better HiDPI scaling
  • GStreamer 1.0 support
  • an updated Gecko engine
  • More Direct3D 10 and 11 features
  • And much more, see the announcement

Install Wine 2.0 (Staging) via official Wine PPA:

The official Wine PPA offers Wine-staging packages that are kinda different to the distro packages.

Wine Staging provides extra features and fixes, but it’s installed to /opt/wine-staging. Thanks to this, you can have both regular Wine version and Wine-Staging in single system.

1. To add the PPA, open terminal (Ctrl+Alt+T) and run the command:

sudo add-apt-repository ppa:wine/wine-builds

For 64-bit system, enable 32-bit architecture (if you haven’t already) via sudo dpkg --add-architecture i386


2. Then updates and install Wine 2.0 staging via commands:

sudo apt-get update

sudo apt-get install --install-recommends wine-staging

To use Wine-Staging, simply add “/opt/wine-staging/bin/” in the fond of executable, for example:



For more, see the Wine-Staging usage.

Install Wine 2.0 (regular) in Ubuntu via Ricotz’s PPA:

Rico Tzschichholz is maintaining an unofficial PPA with regular Wine packages. The PPA’s working good though it’s marked as unstable in the name.

1. To add the PPA, open terminal (Ctrl+Alt+T) and run command:

sudo add-apt-repository ppa:ricotz/unstable


2. Remove previous Wine 1.8 or other regular Wine packages via command:

sudo apt remove wine wine1.8 wine-stable libwine* fonts-wine* && sudo apt autoremove

3. Finally update and install Wine 2.0 via:

sudo apt update

sudo apt install wine2.0

How to Uninstall:

To remove Wine 2.0, simply run the apt remove command in terminal with sudo privilege:

sudo apt remove wine2.0 wine-staging && sudo apt autoremove

And you can remove the PPAs by going to Software & Updates utility under Other Software tab.


For those who want to install the latest AVRDude 6.3 (AVR Downloader / Uploader), here are the backport PPA for Ubunu 16.04, Ubuntu 14.04, Linux Mint 17/18, and derivatives.

AVRDUDE is a utility to download/upload/manipulate the ROM and EEPROM contents of AVR microcontrollers using the in-system programming technique (ISP).

It provides a command-line interface for all downloading and uploading features. Supports a wide range of programming hardware, from cheap ISP plugs that connect the AVR’s ISP interface directly to a computer’s parallel port or serial port. Supports Intel Hex, Motorola S-Record, and raw binary files for input and output.

While the current two Ubuntu LTS offer old versions in their main repositories, I’ve uploaded the 6.3 release into PPA to make it easy to install.

AVRDude 6.3 features:

  • New devices support: ATmega48PB, ATmega88PB, ATmega168PB, ATtiny28 (HVPP-only device), AT90PWM216, ATmega32M1
  • New programmers support:
    • Atmel mEDBG: xplainedmini, xplainedmini_dw
    • ftdi_syncbb
    • uncompatino, ttl232r (FTDI TTL232R-5V with ICSP adapter)
    • Atmel DFU, using FLIP protocol version 1 (AT90USB and ATmegaU devices), or version 2 (Xmega devices)
    • Atmel-ICE (ARM/AVR), JTAG, PDI, debugWIRE, ISP modi
  • The stk500v2 implementation now uses its own higher-level command implementation for byte-wide access
  • The -B option can be suffixed with “Hz”, “kHz”, or “MHz”, in order to specify a bitclock frequency rather than period.
  • Print part id after signature
  • buspirate: Also support “cpufreq” extended parameter in binary mode
  • The “-P net:” syntax (forwarding of serial data over TCP) is now also implemented for Win32 systems.
  • Atmel EDBG protocol support added (JTAGICE3, XplainedPro, Atmel-ICE)

Install AVRDude 6.3 in Ubuntu / Linux Mint:

Either run the following commands one by one in terminal (Ctrl+Alt+T) to add PPA and install the utility:

sudo add-apt-repository ppa:ubuntuhandbook1/apps

sudo apt-get update

sudo apt-get install avrdude avrdude-doc

Or grab the DEB packages for both avrdude and avrdude-doc from the link below and click install via Gdebi or Ubuntu Software App:

Download AVRDude (deb)