Tutorial Proggraming Free

tutorial - Squid Error : Name error: the domain name does not exist

Problem (example):
The requested URL could not be retrieved
While trying to retrieve the URL: http://intranet/

The following error was encountered:
Unable to determine IP address from host name for http://intranet

The dnsserver returned:
Name Error: The domain name does not exist.

This means that:
The cache was not able to resolve the hostname presented in the URL.
Check if the address is correct.

Solution:

append_domain : This directive helps Squid turn single-component hostnames into fully qualified domain names. For example, http://www/ becomes www.example.com/. This is especially important if you are participating in a cache hierarchy.

Add the following directive into you squid.conf file to solve the above problem

append_domain .domainname.com

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source:http://linuxpoison.blogspot.com/2009/06/135781757113183.html

tutorial - Install MS True Type Fonts in Fedora

Microsoft's True Type fonts can also be used on Linux. Not only can they improve visibility, they are essential for proper look and layout. The installation is very simple…

1) Make sure you have the following rpm-packages installed in your distribution. Any version should do.
rpm-build
wget
ttmkfdir utility
cabextract utility

2) # sudo yum install rpm-build cabextract

3) # wget http://corefonts.sourceforge.net/msttcorefonts-2.0-1.spec

4) # rpmbuild -bb msttcorefonts-2.0-1.spec

5) Note the path where the rpm is written and use it in the command below.
# rpm -ivh /usr/src/redhat/RPMS/noarch/msttcorefonts-2.0-1.noarch.rpm

6) Restart the windows manager by pressing Ctrl-Alt-Backspace.

Enjoy your new high quality fonts. To verify that the installation succeeded, please use the command 'xlsfonts | grep ^-microsoft'. You should see a whole lot of microsoft font names there. Please note that you need to restart all programs that you want to make aware of the new fonts.

source:http://linuxpoison.blogspot.com/2009/06/135781757119776.html

tutorial - Create Ubuntu packages (deb)

GiftWrap is made for the artist who wants to share their theme, the developer who wants to share their software, or the common user who wants to install from packages and not source code.

It helps you in creating Ubuntu .deb packages by guiding through the process with minimal fuss and maximum automation. GiftWrap also aims to help you in creating high-quality packages by helping you fill in as most of the package meta-information as possible - either by automatically detecting or explaining the options in an easy to understand manner.

Features:
* Creation of basic packages from source archives or folders
* Creation of debian package rules - so maintainer name, email, description, build-depends, recomments & etc. fields
* Automatic building of packages - so at the end of the process you get an installable .deb that you can share with others (along with a .changes & .orig.tar.gz file for uploading to a PPA)

Installation:
Copy/paste the following into the terminal to quickly install:

echo deb http://ppa.launchpad.net/giftwrap/ppa/ubuntu `lsb_release -cs` main | sudo tee /etc/apt/sources.list.d/ppa.list
sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 207CAD03
sudo apt-get update && sudo apt-get install giftwrap

source:http://linuxpoison.blogspot.com/2009/06/13578175714392.html

tutorial - How to Cut/Split Video using Avidemux

Avidemux is a graphical tool to edit videos. It can open AVI, openDML, MPEG, Nuppelvideo, and BMPs. Most common codecs are supported (M-JPEG, MPEG, DivX, Xvid, huffyuv, WMA, etc.) thanks to libavcodec and libmpeg2. Video can be edited, cut, appended, filtered (resize/crop/denoise), and re-encoded to either AVI (MPEG4/MJPEG) or MPEG 1/2. The Spidermonkey Javascript engine is used to give powerful scripting capabilities.

Installation:
OpenSuse user can use "1-click" installer to install Avidemux
OpenSuse 11.1 - here
OpenSuse 11.0 - here
After sucessfull installation, open the application (Start >> Application >> Multimedia)

For Ubuntu user, Avidemux can install easily by opening the console and typing

sudo apt-get install avidemux

Once installed, you will find on the menu Applications / Sound & Video / Avidemux

To split a file or a section of a file do the following.
Open and select the file you want to split (File / Open).

Then, with the bar below, select the point where we want to start our video and clicking on the letter A using icon

and mark point B

where you want to end (cut) your video (as shown in the figure below)

Finally from the menu select File / Save / Save Video

source:http://linuxpoison.blogspot.com/2009/06/135781757114523.html

tutorial - Multimedia Support in Fedora 11

Why doesn’t Fedora support MP3 ‘out of the box’?

Fedora cannot include support for MP3 or DVD video playback or recording. MP3 formats are patented, and the patent holders have not provided the necessary licenses. Fedora also excludes other multimedia software due to patent, copyright, or license restrictions, such as Adobe Flash Player and RealNetworks RealPlayer.

That doesn’t mean you can’t play .mp3 files in Fedora, it just takes a bit of work (not much).

Follow these instructions to get mp3 and other multimedia support on your Fedora 11.
Open a terminal and become root, then run this command:

rpm -Uvh http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm
rpm -Uvh http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm

Now, Install all other plug ins..

# yum -y install gstreamer-plugins-bad gstreamer-plugins-ugly xine-lib-extras-nonfree

After successful installation, open Amarok or any other multimedia player and try to play the mp3 file and see if all goes fine and you are able to hear the music.

XMMS
To install xmms and make it MP3-capable, start by doing this:

# yum install xmms xmms-mp3

MPEG, QuickTime, AVI, and DVDs
MPEG (the format used on DVDs) represents itself as an open standard, but most Linux distributions won't ship software that read it because of blocking patents held by MPEGLA. AVI and Apple QuickTime have proprietary codecs covered by patents, so most Linux distributions won't ship software that decodes them, either.

Unfortunately, the alternate front end xine is even more broken. It can be installed this way:

# yum install xine xine-lib libdvdcss

Doing this will also install a number of support libraries, including the libdvdcss plugin

source:http://linuxpoison.blogspot.com/2009/06/135781757112308.html

tutorial - Increase the booting speed of Fedora

Initng is a full replacement of the old and in many ways deprecated sysvinit tool. It is designed with speed in mind, doing as much as possible asynchronously. In other words: It will boot your unix-system much faster, and give you more control and statistics over your system.

The basic premise is that startup commands can be launched as soon as their dependencies are met. This limits the effect of bottlenecks like I/O operations; while one program is performing I/O, another can be utilizing the processor. Initng tracks the individual service dependencies in its configuration files.

It is designed to use a minimum of system resources and to boot your system quickly and safely.

Installing initng on a Fedora system
Initng is incorporated into Fedora Extras. Only thing you need to do to install initng is a simple

yum install initng

A new boot entry is automatically added to your grub configuration file, all you'll have to do is reboot and choose the new entry in the grub menu. The old configuration file is backuped as /boot/grub/grub.conf.bak.

The installation also tries to figure out what services/daemons should be enabled by default. Since this process isn't 100% fail proof I recommend you to check the files /etc/initng/default.runlevel and /etc/initng/system.virtual before rebooting.

source:http://linuxpoison.blogspot.com/2009/06/13578175717949.html

tutorial - How to Edit PDF Files in Linux - PDFEdit

PDF files are often believed to be locked, requiring a tool from Adobe to edit or modify. That said, on Linux you can do almost anything with them using a simple software tool: PDFEdit. A combination of a good graphical interface and the power to edit the raw PDF file, PDFEdit is an open source project that gives you the ability to work with any PDF document you wish.

PDFedit is primary created for simple editing and manipulation of documents in PDF format. There is a graphical and command line interface available.

The software lets you change either raw PDF objects (for advanced users) or use predefined GUI functions. Functions can be easily added as everything is based on a scripts.

Scripting is used to a great extent in the editor and almost anything can be scripted. It is also possible to create your own scripts or plugins to enhance the functionality of the package.

PDFedit is a low-level application for technical users that provides structured access to the internal structure of the PDF file. It may require familiarity with PDF specifications to be able to make substantial modifications.

Installation:
OpenSuse user can use "1-click" installer to install PDFedit
OpenSuse 11.1 - here
OpenSuse 11.0 - here

If you are using Debian or Ubuntu Linux, enter: $ sudo apt-get install pdfedit

Editing PDF Files with PDFEdit editor
To start PDFEdit, type: $ pdfedit /path/to/pdf.file &

source:http://linuxpoison.blogspot.com/2009/06/135781757116253.html

tutorial - Front-end for the ClamAV antivirus toolkit - klamav/Clamtk

One of the more popular Linux anti-virus tools is ClamAV. But to most users (especially new users) ClamAV is a bit challenging to use. That is where KlamAV comes in. KlamAV does an outstanding job of making ClamAV a user-friendly tool.

Before using klamav you need to have Clamav antivirus installed:
To install ClamAV on your ubuntu, open the terminal and type: sudo apt-get install clamav

OpenSuse user can use "1-click" installer to install Clamav
OpenSuse 11.1 - here
OpenSuse 11.0 - here

By default, ClamAV does not include any graphical environment and all the operation needs to be done using command line now to make life easy for the user we got two graphical application, Klamav for KDE and Clamtk for Gnome

Ubuntu:
If you're using KDE environment, type in the terminal:sudo apt-get install klamav
If you're using GNOME environment, type in the terminal: sudo apt-get install clamtk

OpenSuse user can use "1-click" installer to install klamav
OpenSuse 11.1 - here
OpenSuse 11.0 - here

OpenSuse user can use "1-click" installer to install Clamtk
OpenSuse 11.1 - here
OpenSuse 11.0 - here

source:http://linuxpoison.blogspot.com/2009/06/13578175717330.html

tutorial - How to disable loading of unnecessary kernel modules

What exactly is a kernel module? A Kernel Module is a program that is not actually compiled into the Linux kernel but is loaded separately. Kernel modules enable you to extend the capabilities of the kernel without the need to build extra functionality directly into the kernel image. A good example is the device driver.

There are certain advantages with using kernel modules as opposed to having the drivers compiled into the kernel. They can be unloaded (rmmod) and reloaded (modprobe, insmod) at any time, allowing you to pass different parameters to them rather than specify them once on bootup as kernel parameters or update them without rebooting. The fewer drivers you need, the fewer modules you need to load and the less memory Linux needs to operate. Also, to upgrade a modularized driver you just need to recompile the module, whereas if the driver is part of the kernel then you have to recompile the kernel. For hotpluggable buses like USB, the modules can be loaded on demand rather than all at once.

You can see what modules are already loaded into the kernel by running lsmod, which gets its information by reading the file /proc/modules

Many time it happens that there are lots of module gets loaded into memory and which are not required and hence its better if we disable loading of such module to enhance the performance of the system.

How to disable loading of unnecessary kernel modules
* Open the shell and type command lsmod to see what are the modules that are loaded.

* Check the value in section "used by", if the value is "0" it means that the this kernel module is not been used by any of the application/process and it's unnecessary occupying the space in the memory, the best way to know about such module to use google/bing search engine and if you feel that this module is not required you can simply unload it, for example if you don;t have the floppy drive then why to load floppy module :)

* Ok, so you have figure out what all module you want to blocking loading at the time of booting, go to console and open file /etc/modprobe.d/blacklist and add the kernel module that you want to disable loading, example shown below where I am disabling the loading of floppy & ipv6 kernel module.

blacklist ipv6
blacklist floppy

This tip can also use it to disable ipv6 on linux unless you wanted to just add the line

blacklist ipv6

source:http://linuxpoison.blogspot.com/2009/06/135781757110668.html

tutorial - Twitter client for KDE 4.2 - KDEtwitter

KDEtwitter is a Twitter widget in KDE 4.2 which allows you to quickly:

* Post messages directly from your desktop, without accessing your Twitter home page
* Get notified when you receive updates

You don’t have to configure anything other than your account and the password associated with it and you’re ready to tweet.

When you click Add Widgets (on top right corner of your desktop), a window labeled Add Widgets appears. It contains a list of all the plasmoids installed on your system, and each one has a description below its name.

And from this list you can select KDEtwitter and add to your desktop and after configuring the twitter username/password you should see something like ... from where you can receive & send messages.

source:http://linuxpoison.blogspot.com/2009/06/13578175715842.html

tutorial - Microblogging client for Twitter, Jaiku, Facebook, Flickr, Digg, and RSS - Gwibber

Gwibber is an open source microblogging client for GNOME developed with Python and GTK. It supports Twitter, Jaiku, Facebook, Identi.ca, Digg, Flickr, and RSS.

Gwibber can post and receive messages from multiple social networking services, including Twitter, the open source Twitter variant, Identi.ca, Laconi.ca, Digg, Pidgin, Facebook, Flickr, Ping.fm, Jaiku and RSS/Atom feeds.

It comes packaged for a number of distributions, including Ubuntu, openSUSE and Fedora. While Gwibber doesn't yet deliver every last feature that every social network it connects to provides, it's a great way to keep up with reading and posting across networks with relatively little effort.

Jaunty Jackalope (Ubuntu) already got gwibber in the repositories and can be installed with a simple command: $sudo apt-get install gwibber
OpenSuse 11.1 user can use "1-click" installer to install gwibber

After successful installation of gwibber, go to terminal (GNOME) and type command: gwibber to start the application

Gwibber's account set up and management is straightforward. Gwibber comes with a few default themes that feature some individual customization options (different social networks can be assigned different colored banners for their updates), and while additional themes are available, they're not located in one central repository.

source:http://linuxpoison.blogspot.com/2009/06/135781757115347.html

tutorial - Kool Ubuntu GDM Themes

Ubuntu Black

CLICK HERE TO DOWNLOAD

Ubuntu Sky

CLICK HERE TO DOWNLOAD

Underground Ubuntu

CLICK HERE TO DOWNLOAD

Ubuntu Wood

CLICK HERE TO DOWNLOAD

Ubuntu Leaf

CLICK HERE TO DOWNLOAD

Ubuntu Blue

CLICK HERE TO DOWNLOAD

Ubuntu Metal

CLICK HERE TO DOWNLOAD

Ubuntu Nuovum

CLICK HERE TO DOWNLOAD

Ubuntu V-TEC

CLICK HERE TO DOWNLOAD

Ubuntu 3D

CLICK HERE TO DOWNLOAD

Ubuntu Rust

CLICK HERE TO DOWNLOAD

Energy Bliss

CLICK HERE TO DOWNLOAD

Ubuntu Professional

CLICK HERE TO DOWNLOAD

Ubuntu NextG

CLICK HERE TO DOWNLOAD

Dark Ubuntu Aurora

Source: http://www.junauza.com/

I hope this tutorial has been useful for you too! If you've enjoyed this post, please consider subscribing to Linuxpoison for future updates and more.

source:http://linuxpoison.blogspot.com/2009/06/13578175713251.html

tutorial - KDE desktop Blogging Client - KBlogger

KBlogger is a simple to use blogging application for the K Destkop Environment. KBlogger integrates in KDE Kicker for easy and fast blogging or is available as a standalone application for KDE 4. The Interface is slick and tries to provide all features support on the server side for your convenience. Just configure your blog, load the editor and start writing.

Installation:
OpenSuse user can use "1-click" installer to install KBlogger
OpenSuSe 11.1 - here

Configuration is done via the applet menu. To enter the configuration menu click on the little arrow left of the applet, then choose Configure KBlogger, the configuration dialog pops up. There you can set all needed options, in case you don't know what an option means, there are some short descriptions:

* API is the type of API you use at your blog, this can be either the Google Blogger API or the MetaWeblog API.

* URL describes the path to the xml-rpc gateway, e.g. http://www.blogger.com/api/RPC2

* Blog-id is the id of your blog on the server.

source:http://linuxpoison.blogspot.com/2009/06/13578175714743.html

tutorial - Searching files using catfish - OpenSuSe

Catfish is a handy file searching tool for linux and unix.

Basically Catfish is a frontend for different search engines (daemons) which provides a unified interface. The interface is intentionally lightweight and simple, using only GTK+ 2. You can configure it to your needs by using several command line options.

At present Catfish supported backends are find, (s)locate, doodle, tracker, beagle, strigi and pinot.

Installation: OpenSuse user can use "1-click" installer to install Catfish
OpenSuSe 11.1 - here

After successful installation go to terminal and type command: catfish to open up the application

When Catfish opens you will see what should be a very user-friendly interface broken into two panes. The left pane is where you enter all of your search options and the right pane is where your search results will appear.

You may also notice there are no options for Catfish itself. This makes Catfish focus only on the searching so it is as efficient as possible, just select the type of search engine you want to use, enter the search phase and hit "find" to get your search results.

I hope this tutorial has been useful for you too! If you've enjoyed this post, please consider subscribing to Linuxpoison for future updates and more.

source:http://linuxpoison.blogspot.com/2009/06/13578175718696.html

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