About me and my life ...

Working with python , opengl and ARB ...

2012-05-21T07:46:00.000-07:00

Today I test a simple script that uses the OpenGL ARB "Architecture Review Board". The script is very simple and can be found on my graphic-3d.blogspot.com. I make this with Python 2.6.4 , pyopengl module.

Fedora 17 beta - youtube under firefox

2012-05-07T13:13:00.000-07:00

I like firefox ... I like youtube also . I don't like Shockwave Adobe plugin. So if you want to see something with youtube under firefox , just disable this great plugin. The firefox comes with many plugins and some working very bad for users. Maybe some of us , in the future will not be "plugin" system. It's a joke... Don't you think ?

Fedora online defragmenter for ext4 filesystem

2012-04-01T12:30:00.000-07:00

The tool is e4defrag.

The man page tell us: reduces fragmentation of extent based file. The file targeted by e4defrag is created on ext4 filesystem made with "-O extent" option (see mke2fs(8)). The targeted file gets more contiguous blocks and improves the file access speed.

Let's try this tool.

You can try under root account this:

# e4defrag -test -cv /home/your_user/

The final result on my account is :

 Total/best extents    170276/165520  Fragmentation ratio    0.03%  Fragmentation score    0.24  [0-30 no problem: 31-55 a little bit fragmented: 55- needs defrag]

Also you have to run e4defrag with the -test parameter for now, since it isn't a fully tested version.

Fedora 16 article on tomshardware website.

2012-03-22T03:47:00.002-07:00

A completely new article about Fedora 16, which could be read by users of this distribution. Obviously written in English, but can guide a beginner to the Fedora distribution. The author of this article is Adam Overa and you can read on Fedora 16 And GNOME Shell: Tested And Reviewed

The new Blender 3D version 2.62 working well with Nouveau

2012-03-11T05:39:00.000-07:00

Blender 3D version 2.62 works well with Fedora 16 drivers Nouveau. Here's a screenshot:

It should be noted the team effort which significantly improved the software. I would say that is a professional software. We can see the video review make by blendercookie with this new features. Video card is FX 5500 and working well with Nouveau. Blender 3D rendered very well and response console was it:

blender-2.62-linux-glibc27-i686]$ ./blender
connect failed: No such file or directory
ndof: spacenavd not found
Xlib:  extension "NV-GLX" missing on display ":0.0".
Xlib:  extension "NV-GLX" missing on display ":0.0".

My opinion is : for those who have older video cards is necessary to implement Nouveau 3D features since FX5200 video cards. Fedora operating system using the kernel: 3.2.9-1.fc16.i686.PAE

name of display: :0.0
display: :0  screen: 0
direct rendering: No (If you want to find out why, try setting LIBGL_DEBUG=verbose)
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
    GLX_ARB_multisample, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_OML_swap_method, 
    GLX_SGI_make_current_read, GLX_SGIS_multisample, GLX_SGIX_fbconfig, 
    GLX_SGIX_pbuffer, GLX_MESA_copy_sub_buffer, GLX_INTEL_swap_event
client glx vendor string: NVIDIA Corporation
client glx version string: 1.4
client glx extensions:
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_visual_info, 
    GLX_EXT_visual_rating, GLX_EXT_import_context, GLX_SGI_video_sync, 
    GLX_NV_swap_group, GLX_NV_video_out, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
    GLX_SGI_swap_control, GLX_EXT_swap_control, GLX_ARB_create_context, 
    GLX_ARB_create_context_profile, GLX_NV_float_buffer, 
    GLX_ARB_fbconfig_float, GLX_EXT_fbconfig_packed_float, 
    GLX_EXT_texture_from_pixmap, GLX_EXT_framebuffer_sRGB, 
    GLX_NV_present_video, GLX_NV_copy_image, GLX_NV_multisample_coverage, 
    GLX_NV_video_capture, GLX_EXT_create_context_es2_profile, 
    GLX_ARB_create_context_robustness
GLX version: 1.4
GLX extensions:
    GLX_ARB_multisample, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_SGIX_fbconfig, 
    GLX_SGIX_pbuffer, GLX_ARB_get_proc_address
OpenGL vendor string: VMware, Inc.
OpenGL renderer string: Gallium 0.4 on softpipe
OpenGL version string: 1.4 (2.1 Mesa 7.11.2)
OpenGL extensions:
    GL_ARB_multisample, GL_EXT_abgr, GL_EXT_bgra, GL_EXT_blend_color, 
    GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_texture_object, 
    GL_EXT_vertex_array, GL_EXT_texture3D, GL_ARB_point_parameters, 
    GL_EXT_draw_range_elements, GL_EXT_packed_pixels, GL_EXT_point_parameters, 
    GL_EXT_rescale_normal, GL_EXT_separate_specular_color, 
    GL_EXT_texture_edge_clamp, GL_SGIS_generate_mipmap, GL_SGIS_texture_lod, 
    GL_ARB_multitexture, GL_IBM_texture_mirrored_repeat, 
    GL_ARB_texture_cube_map, GL_ARB_texture_env_add, GL_ARB_transpose_matrix, 
    GL_EXT_blend_func_separate, GL_EXT_fog_coord, GL_EXT_multi_draw_arrays, 
    GL_EXT_secondary_color, GL_EXT_texture_env_add, 
    GL_EXT_texture_filter_anisotropic, GL_EXT_texture_lod_bias, 
    GL_NV_blend_square, GL_NV_light_max_exponent, GL_NV_texgen_reflection, 
    GL_NV_texture_env_combine4, GL_ARB_texture_border_clamp, 
    GL_ARB_texture_compression, GL_EXT_framebuffer_object, 
    GL_EXT_texture_env_dot3, GL_NV_texture_rectangle, GL_ARB_depth_texture, 
    GL_ARB_occlusion_query, GL_ARB_shadow, GL_ARB_texture_env_combine, 
    GL_ARB_texture_env_crossbar, GL_ARB_texture_env_dot3, 
    GL_ARB_texture_mirrored_repeat, GL_ARB_window_pos, 
    GL_EXT_stencil_two_side, GL_ARB_draw_buffers, GL_ARB_fragment_program, 
    GL_ARB_vertex_program, GL_ATI_draw_buffers, GL_EXT_shadow_funcs, 
    GL_EXT_stencil_wrap, GL_ARB_fragment_program_shadow, GL_ARB_point_sprite, 
    GL_ARB_texture_non_power_of_two, GL_EXT_blend_equation_separate, 
    GL_EXT_texture_mirror_clamp, GL_ATI_texture_mirror_once, 
    GL_EXT_texture_env_combine

120 GLX Visuals
    visual  x   bf lv rg d st  colorbuffer  sr ax dp st accumbuffer  ms  cav
  id dep cl sp  sz l  ci b ro  r  g  b  a F gb bf th cl  r  g  b  a ns b eat
----------------------------------------------------------------------------
0x021 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x0f6 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
...

I will hope we see more news about this issue.

Overview of Blender 2.62 working with nouveau driver without 3d features

2012-03-09T12:07:00.000-08:00

I would like to present one of the best presentations for Blender 2.62. This is a video on youtube, one of the best video presentations in English language, I would have preferred a Romanian subtitles, if they are willing to contact me. What is presented in this video reflect well the new features Blender 3d. Another important aspect esteca if you use linux with nouveau driver on Linux, it will work without 3d support, so as to allow the driver. I test this version with Fedora and nouveau driver and working well without 3d features of nouveau driver. This help much the users.

Spark Linux tablet going up for pre-order next week

2012-03-04T11:05:00.001-08:00

I like linux very much , and when is on little device i like it more. This tablet will be a good solution for the linux users and i hope will come with nice price , because 200 euro is to much for Europe. The tablet wil come with 1GHz / 512 MB and KDE Plasma Active UI. You can read the full article here. See the next video uploaded by arunvinud:

The LightScribe - without labels and handwriting.

2012-02-27T04:41:00.000-08:00

LightScribe is an innovative technology that uses a special disc drive, special media, and label-making software to burn labels directly onto CDs and DVDs.

Download the packages from here.

Use the root account and install this packages :

# rpm -ivh lightscribe-1.18.24.1-linux-2.6-intel.rpm <br />Preparing...                ########################################### [100%]<br />   1:lightscribe            ########################################### [100%]<br /># rpm -ivh lightscribeApplications-1.18.15.1-linux-2.6-intel.rpm <br />Preparing...                ########################################### [100%]<br />   1:lightscribeApplicationswarning: group admin does not exist - using root%)<br />warning: group admin does not exist - using root<br />########################################### [100%]

The path application is /opt/SimpleLabeler/

See the files:

$ ll<br />total 332<br />drwxr-xr-x. 4 root wheel   4096 Feb 27 14:10 content<br />-rwxr-xr-x. 1 root wheel   2980 May 19  2010 launchBrowser.sh<br />drwxr-xr-x. 3 root wheel   4096 Feb 27 14:10 plugins<br />-rwxr-xr-x. 1 root wheel     43 May 19  2010 qt.conf<br />-rw-r--r--. 1 root root      16 May 19  2010 qttr.qm<br />-rwsr-xr-x. 1 root wheel 314088 May 19  2010 SimpleLabeler<br />-rw-r--r--. 1 root root      16 May 19  2010 simplelabelertr.qm

Run the SimpleLabeler , and you see this :

Insert the special media in the special disc drive with the face down.

This is a way to not use labels and handwriting.

G'MIC plug-in for GIMP.

2012-02-18T03:23:00.000-08:00

GIMP is an acronym for GNU Image Manipulation Program and it has many capabilities.
One best feature is plugins system. Plugins may be stored in different locations depending upon your distribution.
The author of G'MIC plug-in tell us: The G'MIC plug-in for GIMP proposes a set of various filters to apply on your images, including artistic effects, image denoising and enhancement algorithms, 3D renderers, etc.. It is a quite large plug-in, integrating a lot of different effects.
You can download the G'MIC plug-in from here.
Unzip the file and go to folder where is the gmic_gimp file.
Use this command to copy the file in the plug-ins folder.

$ cp  gmic_gimp ~/.gimp-2.6/plug-ins/

Once you have installed the plugin just restart the GIMP.
The G'MIC will working just if you have open an image.
You can find it on menu : Filters->G'MIC.... Also , the G'MIC plug-in has available 284 filters.

The latest Linux tutorials written by me.

2012-02-06T03:40:00.000-08:00

Meanwhile I managed to write some tutorials: Using piped examples with tee and xargs.Send emails from linux terminal.Linux command execution using WinSCP.and more... Here are the latest Linux tutorials written by me.

New firefox mozilla 10

2012-02-01T03:51:00.000-08:00

On January 31, 2012 Mozilla released version 10 of the popular browser Firefox. Some important bugs have been corrected and other facilities were launched. I name a few of them:

Anti-Aliasing for WebGL is now implemented
CSS3 3D-Transforms are now supported
The forward button is now hidden until you navigate back
Full Screen APIs allow you to build a web application that runs full screen

List of bugs fixed you can view here.

Qt with threaded OpenGL support.

2011-12-18T05:11:00.000-08:00

Here's a pretty exciting news for developers. Qt, the cross-platform application and user interface framework, is available in version 4.8.0 under fedora 16. The new Ot has the threaded OpenGL support. Under Fedora 16 , we have the development packages:

(1/2): libXv-devel-1.0.6-2.fc15.i686.rpm                 |  38 kB     00:00     
(2/2): qt-devel-4.8.0-0.23.rc1.fc16.i686.rpm             |  10 MB     00:03

We expect developers will use this functionality to create new graphics applications.

Lesson for life ...

2011-11-26T10:34:00.000-08:00

"Do not let your children in front of many people and their words, they are the train ..."
Goodbye Andrei, I hope to see you soon, with love - your father.

Protect your root account.

2011-11-26T02:18:00.000-08:00

I will present a solution to protect the root account, quite funny but still elegant.
You can read about the command trap using : man trap.
What is this command?
when the specified event will occur will execute the command specified.
In this case, it will receive signal respectively will execute one command - exit
The the source code.


 protect()
 {
 echo "What is the secret ?"
 trap protect 2 20
 read -s resp
 if [ "$resp" != "asd" ]; then
 echo "Error!"
exit
fi
 }
 protect

The result will be leaving the root account if you do not answer the question correctly.
Now protect the file against unauthorized changes:

# chmod 700 /root/.bashrc

You can create using the example above, different ways to execute various commands.

Qt Developer Days 2011

2011-11-11T13:21:00.000-08:00

At 08 November, 2011 the oficial website has announced:
Qt SDK brings the SDK build targets to the level of the latest Symbian devices and the Nokia N9. It also introduces right-to-left and pinch area support (Qt 4.7.4 / Qt Quick 1.1) and new NFC (near field communication) and Bluetooth APIs (Qt Mobility 1.2)
Also it seemed very interesting the demos from Qt Developer Days 2011 Munich.

Interesting is that they came over 900 members of the Qt Community descended on Munich for the first half of Qt Developer Days.
Anyway the bad news : Desktop Mobility is not included at the moment.

Android ARM Assembly by Vikram Aggarwal

2011-09-25T15:34:00.000-07:00

Today I read an interesting article about Android.
The article is written by the developers Vikram Aggarwal , software engineer at Google.
This article - tutorial consists in a series on learning ARM assembly on Android.
Its subject is "...calling Assembly code from Android applications".
The tutorial contains the necessary source code and details for the reader to understand how it works.
For those who have never used Gas (GNU Assembler), this article is of interest much.
I wonder if there is anyone interested in the Fedora community to write Android applications.
This article can be read here.

Creating folders and documents with gdata module

2011-09-24T10:50:00.000-07:00

Today I played with gdata python module.
The problem that I solved it:
creating folders and documents in your Gmail account.
First you need to install gdata module.
In fedora I used:

yum install python-gdata.noarch

Here are the first lines of source code that creates a folder named test-fedora

Python 2.7.1 (r271:86832, Apr 12 2011, 16:16:18) 
[GCC 4.6.0 20110331 (Red Hat 4.6.0-2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import gdata.docs.service
>>> my=gdata.docs.service.DocsService()
>>> my.ClientLogin('your-account@gmail.com','your-password')
>>> my.CreateFolder('test-fedora')

I tried to automate the process of creating folders and I used a list and instruction for

>>> folders=['aaa','bbb','ccc']
>>> for f in folders:
...     my.CreateFolder(f)
...

To create a document to write more lines of code.
This is because there are many types of documents

>>> new_entry = gdata.GDataEntry()
>>> new_entry.title = gdata.atom.Title(text='fedora-test')
>>> category = my._MakeKindCategory(gdata.docs.service.DOCUMENT_LABEL)
>>> new_entry.category.append(category)
>>> created_entry = my.Post(new_entry, '/feeds/documents/private/full')

Here's a simple solution to avoid loss of mail password.

>>> import getpass
>>> username = raw_input('Please enter your username: ')
Please enter your username: user1
>>> password = getpass.getpass()
Password: 
>>> print username
user1
>>> print password
pass1

I hope you will use this

The list of linux tutorials ...

2011-09-15T00:05:00.000-07:00

The last time I wrote small tutorial for free-tutorials.org site.
These tutorials have covered several areas.
Here are targeting Linux.
The indication of a denial of service (DoS) attack...
How to display memory in real time on Linux system...
Change settings and passwords in Windows using Lin...
How to change bash custom prompt ?
How to use the import command to take screenshots?
Linux commands : "find" and the option "empty"
Create html file with bash script.
Simple bash script to create folders, files and im...
Using wget tool
error: dd: opening `/dev/sdb1': Permission denied...
error: 'memset' was not declared in this scope
Installing and configuring the Eclipse IDE - Googl...
How to set up an external webrowser on Eclipse IDE
Fedora - Install Skype
Modifying shortcuts keys on Bluefish 1.0.7
Fedora - How we can get movies from youtube.
Fedora 12 - How can we run one script when system ...
Linux Text-To-Speech Tutorial
Geany and regular expressions.
Yumex on Fedora
Assign keys on Linux.
I will try to write more tutorials about Linux...

Fedora 15 : Extracting rar files

2011-09-10T05:00:00.000-07:00

UnRAR package can be installed from here.

The unRAR utility is a freeware program, distributed with source code
and developed for extracting, testing and viewing the contents of
archives created with the RAR archiver version 1.50 and above.


unrar-3.9.9-1.fc15.x86_64.rpm  
unrar-3.9.9-1.fc15.i686.rpm  
unrar-3.9.9-1.src.rpm  
unrar.spec


$ unrar

UNRAR 3.92 freeware      Copyright (c) 1993-2010 Alexander Roshal

Usage:     unrar  - -  
               <@listfiles...> 


  e             Extract files to current directory
  l[t,b]        List archive [technical, bare]
  p             Print file to stdout
  t             Test archive files
  v[t,b]        Verbosely list archive [technical,bare]
  x             Extract files with full path


  -             Stop switches scanning
  ad            Append archive name to destination path
  ai            Ignore file attributes
  ap      Set path inside archive
  c-            Disable comments show
  cfg-          Disable read configuration
  cl            Convert names to lower case
  cu            Convert names to upper case
  dh            Open shared files
  ep            Exclude paths from names
  ep3           Expand paths to full including the drive letter
  f             Freshen files
  id[c,d,p,q]   Disable messages
  ierr          Send all messages to stderr
  inul          Disable all messages
  kb            Keep broken extracted files
  n       Include only specified file
  n@            Read file names to include from stdin
  n@      Include files listed in specified list file
  o[+|-]        Set the overwrite mode
  or            Rename files automatically
  ow            Save or restore file owner and group
  p[password]   Set password
  p-            Do not query password
  r             Recurse subdirectories
  sl      Process files with size less than specified
  sm      Process files with size more than specified
  ta      Process files modified after  in YYYYMMDDHHMMSS format
  tb      Process files modified before  in YYYYMMDDHHMMSS format
  tn      Process files newer than 
  to      Process files older than 
  ts[N]  Save or restore file time (modification, creation, access)
  u             Update files
  v             List all volumes
  ver[n]        File version control
  vp            Pause before each volume
  x       Exclude specified file
  x@            Read file names to exclude from stdin
  x@      Exclude files listed in specified list file
  y             Assume Yes on all queries

Works well.

Fedora and laptops - only a brief look ...

2011-07-03T01:18:00.000-07:00

Today I looked on the internet to see a laptop for me.
I've seen some good models in price / quality.
Then I remembered that someone had compatibility problems with a Dell laptop, which accept only Vista drivers.
I found the link, but unfortunately the list is small and outdated.

I think that would be an important step in promoting Fedora if we update this page.
I'm sure most of us have installed Fedora on the laptop.
When installing Fedora , we can send hardware profile to Fedora Team.
If data on computers that can run Fedora would be available, users would receive real help.
On the other hand, I saw several laptops that are available in stores various operating systems.
Unfortunately it's just a fantasy..Why?
Here is a clear example of store : a turnover of euro 102 million in 2010 , see image:

This is not an error in the database selection, is just a trick to not take questions.
It's pathetic.

Firefox sync - sinking ?

2011-06-15T23:13:00.000-07:00

Today I tried to use firefox sync.
I do not remember if I had user account , but I tried to make a password reset.
I do not know if the same thing happens on Windows, but on Fedora I received a strange thing ....
I assumed that it is a cookie, but it is not normal.
Maybe someone can tell what it is ...
Here's the picture with this strange number:

The myth of drop_caches

2011-06-03T03:23:00.000-07:00

I will try to clarify the myth about drop_caches.

This along with other settings can be made in the folder /proc/sys/vm/ .

First, the files in this directory can be used to tune the operation
of the virtual memory (VM) subsystem of the Linux kernel and also to
writeout of dirty data to disk.

About drop_caches we can say that is only one of the options and not only make
causes the kernel to drop clean caches, and dentries inodes from memory,
the result causing that memory to become free.

We have three basic options :

to free pagecache: echo 1 > /proc/sys/vm/drop_caches
to free dentries and inodes: echo 2 > /proc/sys/vm/drop_caches
to free pagecache, dentries and inodes: echo 3 > /proc/sys/vm/drop_caches

Note that user should run sync first.

What happens then?

The answer is also simple and clear.

If you drop the cache than the CPU load go up.This happen because the cache is gone.

Also available RAM goes up, because the cache is empty.

Logical , the performance will suffer because you are not taking advantage of the cache.

Then over time, the caches will fill and this is a good thing, if you don't instruct Linux to drop the caches.

In reality dropping caches has little positive effect on performance, but in fact, it tends to have a negative effect in long term.

I hope I have correctly understood and explained, so if you think it is not, I wait your feedback.

Fighting Blender, NVIDIA and GNOME ...

2011-06-03T02:19:00.000-07:00

Today I spent some time with Blender, NVIDIA and GNOME ...

Since I did preupdate and put Fedora 15, the system worked well until today.

Today I tried to relax a bit with Blender 3D, but ...

[free-tutorials@user ~]$blender<br />Info: Config directory with "startup.blend" file not found.<br />Segmentation fault (core dumped)</code></pre>How to prevent uploading that file? Simply using:
[free-tutorials@user ~]$blender --factory-startup <br />Segmentation fault (core dumped)</code></pre>Obviously, I should try to debug:
[free-tutorials@user ~]$blender --factory-startup  -d<br />Blender 2.57 (sub 0)<br />Build: 2011-04-27 16:56:56 Linux:32bit Release<br />argv[0] = blender<br />argv[1] = --factory-startup<br />argv[2] = -d<br />read file <br />  Version 256 sub 6 svn r36063<br /><br />ordered<br /> OBCube<br /> OBLamp<br /> OBCamera<br />Segmentation fault (core dumped)</code></pre>Simply don't wants, it's something related to graphics card ... 
[free-tutorials@user ~]$blender --factory-startup  -d -noglsl <br />Blender 2.57 (sub 0)<br />Build: 2011-04-27 16:56:56 Linux:32bit Release<br />argv[0] = blender<br />argv[1] = --factory-startup<br />argv[2] = -d<br />argv[3] = -noglsl<br />read file <br />  Version 256 sub 6 svn r36063<br /><br />ordered<br /> OBCube<br /> OBLamp<br /> OBCamera<br />Segmentation fault (core dumped)</code></pre>So the problem is not related to GLSL.
Then I tried to see what glxinfo says.
[free-tutorials@user ~]$glxinfo | grep Error<br />Error: glXCreateContext failed</code></pre>I found this problem and I added to xorg.conf the following lines of code.
Section "Files"<br />ModulePath "/usr/lib/xorg/modules/extensions/nvidia"<br />ModulePath "/usr/lib/xorg/modules/drivers"<br />ModulePath "/usr/lib/xorg/modules"<br />EndSection </code></pre>I must admit that after restarting the computer, greeted me with the gnome interface and unprecedented special effects.
Then I waited ... and waited ... I fixed up with a simple line of code:
$  gsettings set org.gnome.desktop.session session-name 'gnome-fallback'</code></pre>... written in xfce terminal, because in gnome I have not succeeded.
Now I have the old gnome, slightly improved but it works flawlessly with Blender 3D...



Google's calculator
2011-04-26T08:01:00.000-07:00
If you have to do simple calculations you can use google search.
As you can see in the picture below is pretty simple.



Good news : "A tour of Eclipse Helios" by IBM
2011-04-21T00:52:00.000-07:00
It's a pretty good and complete information about Helios ...
Article begins: Helios is the simultaneous release of 39 Eclipse projects. In terms of statistics, the Helios release includes 33 million lines of code developed by about 500 Eclipse.org committers from 44 companies...
You can read here and you will be impressed by the new Helios.
The best part for Linux users is Linux tools.
As Andrew Overholt says in the same article:
"The Linux Tools project also aims to increase the amount of Eclipse technology available in Linux distributions. We are working towards this goal by providing a build harness of the Eclipse SDK that is easy to consume for Linux distributions and already have a number of distribution consumers."
I have not yet found the negative aspects from the Helios ...