How to completely erase files, directories, or hard drives

Requires OS.

Windows:

Eraser – http://www.heidi.ie/node/6

Linux:

Use Secure-Delete Tools.

Reference: http://www.techthrob.com/tech/securedelete.php

Bootable CD. Erase a hard drive.

Use Darik’s Boot And Nuke.

1. Create the bootable CD.
   • Download the .iso file.
   • Burn it to a CD.  For example: use InfraRecorder.
2. Boot from the CD.
3. The program will detect any hard drives on the computer.
4. Select the hard drive you want to wipe.  Optionally change the method that is used to wipe the hard drive.
5. When ready, press F10 to start the process.

How to access shared folder in Windows host from Ubuntu guest

1. Create shared folder in Windows.
   The is the source folder.  For example: e:\ubuntu_share
2. Specify the shared folder in the Ubuntu guest configuration.
   
3. Create destination folder in Ubuntu.
   For example: /myshare
4. Open a Terminal window in Ubuntu.
5. Type:
   sudo mount -t vboxsf <source folder> <destination folder>
   For example:
   sudo mount -t vboxsf ubuntu_share /myshare

avast! anti-virus

Recently, I received an email with attachment in my Yahoo Mail Inbox.  Yahoo Mail indicated that the attachment contained no virus after scanning it with Norton Anti-Virus.  So I proceeded to download the zip file.  Thankfully, I have avast! anti-virus installed.  avast! warned me that the zip file contained Trojan Horse.  I quickly canceled the download.  I highly recommend avast!anti-virus.  There is a free version for home users.