If you want to erase a rewritable Disk in ubuntu use the following command from your terminal

I think this is best done as a numbered list.

However, before I get into this: It is possible to dual-boot Ubuntu and Windows. This means that when you turn on your computer, you’ll get a menu that says “Ubuntu” and “Windows” and you can pick which one to boot into.

They have a script in upstart which is not meant to be run manually and if you do it will erase your whole file system. Additionally it seems that the fact that you shall not run that script is not communicated anywhere.

Did Windows crash beyond repair? If so, you probably want to get your files off of the drive before you erase everything and reinstall Windows. This tutorial will help you do exactly that. We're going to use Ubuntu's LiveCD mode. Ubuntu is a popular Linux distribution that's a free and open source alternative to Windows.

Bleach bit is a utility which can free disk space, removes hidden junk, and easily guards your privacy. It can erase cache, delete cookies, clear Internet history, remove unused localizations, shred logs, and delete temporary files.

From my perspective, offline installation is the weakest spot in the Linux superstructure. I understand the shared libraries concept, and I think it’s a marvelous thing, but it doesn’t erase the fact that if you’re not in a position for at least intermittent Internet access, it’s a dealbreaker.

Creating users in Ubuntu means that you must be aware of the options for home directory, UID, User Identifier options and how to recognize password options.

Here you can see the default login screen for Ubuntu 8.10. You simply add username and password and you have access to the Desktop. Simple, however, as you will see there are many options that can go with this login process. If you will go to System/Administration and select Login Window you will find that you have a lot of options available for login.

CAUTION: This procedure will erase all your router's configuration.

To reset your CISCO router password, you need to access the ROM Monitor mode. To access the ROM Monitor mode, start your minicom and reboot your CISCO router. Upon booting send the CTR+BREAK sequence by pressing CTRL-A F on your keyboard.