Free and Open Source blogger with an attitude
Here’s a video showing you how to crack Wireless WEP keys using Backtrack 4 and aircrack-ng.
Additionally, you need a compatible wireless adapter or compatible wireless chipset which can be used with aircrack-ng.
Here are the list of the best wireless cards to use(according to aircrack-ng wiki):
Good luck!
This post describes the steps on how to change the Linux I/O scheduler dynamically while running a Linux operating system. You can refer to the previous post on the explanation of the differences of Linux I/O schedulers.
I/O schedulers determine how disk read/write are managed by the Linux kernel. Changing I/O scheduler requires you to know the name of your block device. So assuming your disk drive is “sda”, you can change the I/O scheduler using this command.
sudo echo noop > /sysfs/block/sda/queue/scheduler
This will change “sda” disk scheduler to NOOP, which is suitable for SSD drive. To display the current i/o scheduler, you only need to run this command.
cat /sysfs/block/sda/queue/scheduler
anticipatory deadline cfq [noop]
Note that, you will need to run this command each time you reboot or switch on your machine. In order to make the change permanent, you need to edit /etc/sysfs.conf and add “block/sda/queue/scheduler = noop” at the end of the file.
One of the factor that makes your system easily crackable is the weak password. PAM cracklib forces users to choose stronger password by analyzing the password strength, length and entropy.
To enable pam_cracklib in Debian / Ubuntu operating system, you need to install libpam_cracklib:
sudo apt-get install libpam_cracklib
Then edit the “/etc/pam.d/common-password” file using your favorite editor. Then, add and uncomment the following line at the end of the file.
password required pam_cracklib.so retry=3 minlen=6 difok=3
difok determines the number of same characters that allowed to be present in the old and new passwords.
Portable USB drive (sometimes called pendrive) has gained popularity as a medium for storing documents. Computer users would work on the files that they store on the usb drive and occasionally would copy them on their computer, or vice versa.
However this would cause problems if there’s a lot of files being worked on and transfered between usb drive and computers. Valuable time might be lost solely for identifying which of the files are more recent and need to be updated.
Fortunately there’s ‘rsync’, a tool which can be used to synchronize files between the computer and usb drive. Assuming you use Debian or Ubuntu, you only need to start ‘synaptic’ and select ‘rsync’ package. Once installed, start the terminal application and you can begin synchronizing the files using this command
$ rsync -r -vv /home/username/Documents/ /media/your_usb_drive
The general format of rsync command is :
$ rsync -r -vv <local document directory> <remote backup directory>
rsync only updates file which has been changed and would save time and precious harddisk space from maintaining duplicate files.
A Windows version is also available at : http://www.rsync.net/resources/binaries/cwRsync_3.1.0_Installer.zip
Ubuntu 10.10 Maverick Meerkat release is just around the corner!
Here’s how to upgrade Ubuntu 10.10 Maverick Meerkat using bash shell
sudo sed -i 's/lucid/maverick/g' /etc/apt/sources.list && sudo aptitude update && sudo aptitude dist-upgrade
sudo aptitude install update-manager-core
sudo do-release-upgrade -d
That’s it! Happy upgrading!
Mobile application developers may have realize that one of the best (and recommended) way to distribute their JavaME/J2ME application is by hosting it on a website. This makes it easier for potential users to navigate and download the .jad or .jar files from their phone browsers and to execute it directly.
However, some web servers are not configured to handle .jar / .jad file requests, eventually leading to failed install response received by the mobile users.
To remedy this, .jad / .jar files need to be associated with the correct MIME type. In Apache, you can do this by creating ‘.htaccess’ file in your web directory, and inserting these lines :
# JavaME
AddType text/vnd.sun.j2me.app-descriptor .jad
AddType application/java-archive .jar
Afterwards, safe the file. The web server should behave accordingly when requests are made to either of these files. For other web servers, please refer to their respective manual or online-help on how to change document MIME type.