Archive for the ‘How To’ Category

Skype for Ubuntu Karmic is still not available when I write this article but you still can use Skype 2.1 Beta 2 for Linux for (Ubuntu 8.10/ intrepid) installer to run skype in your Karmic.

First download the skype installer.

Go to: http://www.skype.com/intl/en/get-skype/on-your-computer/linux/.



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RAR (Roshal Archive) is one of well known archive file format available in compress technology. It’s developed by Eugene Roshal (Russian Software Engineer). Free version which only can read (extract) in Linux are PeaZip and unrar. The shareware version also available in Linux.

Although RARLAB distribute the source code and binaries (not under free software license), it’s only can extract not create the RAR archive. I think that’s the reason why ‘rar’ is not popular in Linux community.

To extract ‘rar’ file in Linux Ubuntu you need additional program.
Before you follow the instruction below, make sure you are connected to the internet.

First, open Linux Terminal (Applications > Accessories > Terminal) and type $sudo apt-get install unrar.


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Airodump-ng is one of favorite tools in hacking wireless network. When I upgrade my ubuntu from Gutsy to Intrepid, I can’t run this application anymore. It’s not application error because I can run it in Gutsy version before. My wireless card chip set is ‘ipw3945’.

The error message is a bit complicated as you see below.


ioctl(SIOCSIWMODE) failed: Device or resource busy

ARP linktype is set to 1 (Ethernet) – expected ARPHRD_IEEE80211,

ARPHRD_IEEE80211_FULL or ARPHRD_IEEE80211_PRISM instead. Make

sure RFMON is enabled: run ‘airmon-ng start wlan0 <#>’

Sysfs injection support was not found either.


Mean that if you want your airodump-ng run, you will need to try to fix the bolds problems above. Your problem may be one of it but in my case not even one of the error message.

Try to figure out the answer quite some times which is actually is very simple.

It’s only change the ipw3945 chip set mode from ‘Managed‘ to ‘monitor‘.


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Youtube is one of the biggest video source that available in the internet. The problem is youtube doesn’t allow us to download their videos directly from their website. There are many free youtube downloaders you can download from the internet. But, now, I will show you how to download the youtube videos without using any software.

The trick is, using free online downloader. There few websites provide this service. One of it is, ‘Download youtube videos‘ and it’s my favorite. It’s very easy to use. The only problem is sometimes a pop up adult pages come out at the first time you open the page.

Step 1. Open youtube website and select a video that you want to download.
Select the web page address of the youtube video and copy it. To copy it’s very easy, just block the address link, press right mouse button and select ‘copy’.


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This is my experience when I replaced my old Gutsy with Intrepid.

When I use Linux, I always divide my hard disc into 3 partitions, System, Swap and /Home. It’s a good idea because next time you want to replace your OS, you will not lost all your /Home data.

For your Virtual Box, you will still have most all of your old configuration and the image file. When I did this upgrade, I still have my old virtual box setup and my OS image inside it.

I said not all because the ‘saved state‘ you can’t get it back. You have to press the ‘Discard‘ before you can use it. But it’s ok, only take few seconds for an OS to reboot.

Below are the steps.
First, go the virtual box website and download the program.

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Below is the common error that I always have when I force my Firefox to close.

Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.

You can’t fix it by log out from the system. You can only do 2 things, kill the Firefox process or restart your system. The second option will take a longer time, so let’s do the first one.

Open your Linux terminal (Applications>Accessories>Terminal) then type: ps ax | grep firefox.

You will see the PID number on the left side. PID is Program Identifier. The number can be different.

Have to have stop the process by kill the PID one by one.

Now, start your Firefox again. If you see the screen below mean the problem is fixed.

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hddtemp is a utility to read the temperature of hard disk. It only works if the hard disk has a temperature sensor. hddtemp will read Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T) information on your hard disk. hddtemp can work as simple command line tool or as a daemon.


Before you start the installation process, make sure that you are connected to the internet.

Open your Ubuntu Terminal (Applications > Accessories > Terminal), and type ‘sudo apt-get install hddtemp‘.


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