The New Version of Ubuntu is available free of charge, you will get a CD of the latest version (9.10 (Karmic Koala)) with no extra cost, but the delivery may take up to ten weeks, so you should consider downloading the CD image if you have a fast Internet connection.Don't Misuse this facility.

UFW or Uncomplicated Firewall, is a text based firewall that works with iptables. UFW is designed to be an easier way to manage a firewall from the command line. Whether this is easier than learning iptables or not, you can decide. But UFW comes partially set up when you install Ubuntu.

If want to make a simple video tutorial, you can easily do it with a simple utility RecordMyDesktop. This will record all the screen activities with sound. You can control quality of video and audio. when you press on record button it will start recording, disappear the windows and appear an icon shown bow in taskbar. Output file format is .ogv. You can convert it to any format like avi, 3gp etc..

The attempt to copy the entire disk image using cp may omit the final block if it is an unexpected length; dd will always complete the copy if possible.
We can use the dd command to create an ISO disk image of a CD or DVD.

"Comments are being sought on this article prior to final release. Please send any comments to www-international at w3 dot org. We expect to publish a final version in one to two weeks..."

You can login to a remote computer via XDMCP if it is configured to allow XDMCP logins. I will explain how I did it on two Ubuntu machines running gdm.

One of the things you may find you want to do often from your command line is to view the contents of a text file. This could be to view the contents of some startup script or just one of your own basic configuration files like .bashrc or .bash_aliases. The command is simple to use.

Linux supports tons of tools and utilities for scanning network vulnerabilities, cracking passwords and possibility of intrusions. Please always keep in mind that these tools are not for harm a system, but for protect them.