Solution for APT Error: "E: The package NAMA needs to be reinstalled, but I can’t find an archive for it"

Few days ago, I re-installed VLC which was removed accidentally. Suddenly, my laptop turned off because of my battery, so VLC was not installed correctly and caused a problem when running APT command with error message: "E: The package vlc needs to be reinstalled, but I can't find an archive for it.".

I have never encountered this error message before. Well, I copied the error message to Google search and fortunately, Google gave me everything including the solution for this error message.

And here is the solution:

• sudo dpkg --remove --force-remove-reinstreq NAME

Well, I didn't forget to change NAME with the problematic package in this case, vlc. So, the command should look like this:

• sudo dpkg --remove --force-remove-reinstreq vlc

Once, VLC completely removed, type this command to install VLC again:

• sudo apt-get install vlc

If everything does well, APT can now be used as usual.

Good luck!

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Darktable : Open Source/Free Adobe Lightroom for Ubuntu

Darktable is an open source photography workflow application and RAW developer. A virtual lighttable and darkroom for photographers. 

Darktable is an Open Source application that's equal to Adobe Lightroom, this is an other interesting FOSS project that focus on Graphic processing which ability to develop (process) raw images and enhance them. Darktable interface is really good and easy to understand besides of it's contain of many production tool (image operation, white balance, exposure control, tone mapping), plugin and effect which can use it.

This application is fully safe for a beginner, all editing process is fully non-destructive and only operates on cached image buffers for display. The full image is only converted during export.

Darktable Features
Currently darktable version provider a 38 image operation plugins, besides of some features that I've mention above, here list of Plugins and effect that can use taken from its website :

Color image operations:

• overexposed: This module is a useful feature that displays pixels outside dynamic range.
• velvia: The velvia module enhances the saturation in the image; it increases saturation on lower saturated pixels more than on high saturated pixels.
• channel mixer: This module is a powerful tool to manage channels. As entry, it manipulates red, green and blue channels. As output, it uses red, green, blue or gray or hue, saturation, lightness.
• color contrast
• color correction: This module can be used to modify the global saturation or to give a tint.
• color zones: This module allows to selectively modify the colors in your image. It is highly versatile and allows every transformation possible in the LCh colorspace.

Effects/artistic image post processing:

• framing: This module allows you to add an artistic frame around an image.
• split toning: Original split toning method creates a two color linear toning effect where the shadows and highlights are represented by two different colors. darktable split toning module is more complex and offers more parameters to tweak the result.
• vignetting: This module is an artistic feature which creates vignetting (modification of the brightness/saturation at the borders).
• watermark: The watermark module provides a way to render a vector-based overlay onto your image. Watermarks are standard SVG documents and can be designed using Inkscape. The SVG processor of darktable also substitutes strings within the SVG document which gives the opportunity to include image-dependent information in the watermark such as aperture, exposure time and other metadata.
• soften: This module is an artistic feature that creates the Orton effect also commonly known as softening the image. Michael Orton achieved such result on slide film by using 2 exposures of the same scene: one well exposed and one overexposed; then he used a technique to blend those into a final image where the overexposed image was blurred.
• grain: This module is an artistic feature which simulates the grain of a film.
• highpass: This module acts as highpass filter.

find more information about darktable feature here

Install darktable in Ubuntu
How to install darktable is simply easy, Darktable has available in PPA so you can install trought it, do as follows :

• sudo apt-add-repository ppa:pmjdebruijn/darktable-release-plus
• apt-get install darktable exiv2

Darktable in action

Comparison : Darktable an Adobe Lightroom
Actually, I have never compare it directly, but someone in youtube has a brief explanation regarding to it, see following video to see the comparison of Darktable and Adobe lightroom to do such RAW photo editing. (this video is taken from youtube that's belong to TutorialGeek )

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Boost Apt-Get Download Speed Using Apt-Fast and Apt-Proz, Install Them on Ubuntu via PPA

Recently, I have wrote about how to limit apt-get download speed. Today, I'd like to show you cross-purposed applications called apt-fast and apt-proz. Both of them can boost your apt-get download speed by using such an engine, apt-fast use Axel engine and apt-proz use ProZilla engine. They can do parallel download, so as expected, your download speed is faster than usig reguler apt-get operation.

Apt-Fast

Install it on Ubuntu (Lucid, Maverick, Natty, Oneiric):

• sudo add-apt-repository ppa:tldm217/tahutek.net
• sudo apt-get update
• sudo apt-get install apt-fast

Usage instruction:

• sudo apt-fast install packge_name

or

• sudo apt-fast upgrade

Apt-Proz

Install it on Ubuntu (Lucid, Maverick, Natty, and Oneiric):

• sudo add-apt-repository ppa:tldm217/tahutek.net
• sudo apt-get update
• sudo apt-get install apt-proz

Usage instruction:

• sudo apt-proz install package_name

or

• sudo apt-proz upgrade

Enjoy :)

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How to Limit Apt-Get Download Speed

Hello everybody, have a nice weekend! Today I'd like to show you how to limit apt-get download speed. This trick is useful when you're sharing your Internet connection among your friends or family. With this trick, you can perform such apt operation (install or upgrade) without interrupting the other members of your network.

In case, you want to limit your apt-get download speed at 20kb/s, so you should run the following command to perform apt-get operation (install or upgrade):

• sudo apt-get -o Acquire::http::Dl-Limit=20K install package_name

Please take a look at statement  "Acquire::http::Dl-Limit=20K", replace "20K" with your desired download speed. This trick was tested and worked well on Ubuntu 11.10 Oneiric Ocelot Beta 2, but it should works on other versions of Ubuntu too.

Got questions? Have something in your mind? Please don't be a stranger, just fill in the form :)

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