the world is a pixel
Posts tagged ubuntu
Heroku on Ubuntu 11.04 (Natty Narwhal)
Sep 28th
As root execute:
apt-get update apt-get install build-essential ruby rails rubygems1.8 apt-get install ruby1.8-dev libopenssl-ruby
Chance PATH at /etc/environment:
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/var/lib/gems/1.8/bin"
Update your current environment:
source /etc/environment
Install the Heroku gem:
sudo gem install heroku
Run Heroku authentication configuration:
heroku auth:login
Enter the credentials for your Heroku account.
Done!
AVCHD (.MTS) video files
Jun 10th
Miojo Script
Jan 28th
O pre-requisito é o notify-send, um utilitário de linha de comando do libnotify. No Ubuntu:
sudo aptitude install libnotify-bin
E aqui o script em si:
sleep 5m; notify-send "aviso" "tirar o miojo do fogo"
Pronto, depois de cinco minutos isso vai aparecer:
OpenCV on Ubuntu
Dec 21st
Open Computer Vision Library or just OpenCV, is a cross-platform computer vision library focused on real-time image processing for video files or webcams.
You have two options to obtain the environment to develop on OpenCV. You can insert a new repository in your package manager or compile it by yourself.
For Ubuntu 9.10 Karmic Koala there’s this repository with OpenCV’s package.
To compile it you have to install some additional libraries compile it by your self. And it’s instructions vary for each distribution and version. For example, from Ubuntu Linux 9.10 to 9.04, the process varies slightly. I followed the instructions on this post “Installing OpenCV 2.0 on Ubuntu 9.10 Karmic Koala”.
After you have installed and have a well configured OpenCV development environment, you can compile a “source.c” file into a “program” binary like this:
gcc gcc source.c -o program `pkg-config opencv ‑‑libs ‑‑cflags`
Congelando e Ressuscitando Processos
Nov 14th
Nem só de morte vive o kill.
Suponha que você tem um processo chamado program e quer congelar seu funcionamento. Para congela-lo sem mata-lo você pode mandar um sinal SIGSTOP com:
kill -s stop `pidof program`
Para ressuscitar o mesmo processo:
kill -s cont `pidof program`
JavaFX 1.1 for Linux workaround
May 16th
Download
javafx4linux.tar.bz2 (~ 36Mb).
Installing
1) Extract the javafx4linux.tar.bz2 file. In this example I’m placing it on my Desktop. After the installing process you can remove it.
2) Open your NetBeans 6.5 and go at Tools → Plugins and go to Downloaded tab. In a plain and new NetBeans installation there will be no plugin in this tab yet.
3) Click on the Add Plugins button and head to the directory you extracted the file and select all .nbm files.
4) You will see a list of 22 plugins selected. Click on the Install button.
5) Just keep clicking on the Next button.
6) Check the license agreement accept box.
7) You’ll see a warning because the Linux pluggin is not signed. Don’t worry, just click Continue.
8) Click on Finish to restart NetBeans.
9) Now we can test it. Go at File → New Project, select the JavaFX on Categories and JavaFX Script Application on Projects.
10) Put some code and run it. There is. JavaFX on Linux.
Considerations
This is not a official of JavaFX for Linux! This solution was tested on Ubuntu 9.04 “Jaunty Jackalope” with Java 6 update 13 and NetBeans 6.5.1, but should also work with others Linux distributions and Java versions greater than 5.
Known bugs
As a non official workaround for JavaFX for Linux you may notice some drawbacks. Some parts of the JavaFX runtime rely on native implementations on the specific operational system. You may not use some multimedia capabilities as video playback, JavaFX Mobile emulator and some performance issues in some effects. Despite that, is perfectly possible to develop applications using JavaFX on NetBeans.
Thanks
I’d like to thanks some guys around the world. Weiqi Gao’s original post on JavaFX on Linux, HuaSong Liu article on DZone and Kaesar Alnijres post.
