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There is currently a lot of spam where the spam information is attached as .pdf or .xls files, sometime also hidden inside a .zip file. While these spam mails are not easy to catch with e.g. SpamAssassin or a Bayes filter, the ClamAV virus scanner can catch them easily when it is fed with the correct signatures as ClamAV is built to scan mail attachments.

Automated Image & Restore (AIR) is an open source application that provides a GUI front end to the dd/dcfldd (Dataset Definition (dd)) command. AIR is designed to easily create forensic disk/partition images. It supports MD5/SHAx hashes, SCSI tape drives, imaging over a TCP/IP network, splitting images, and detailed session logging.

Image rollovers are usually composed of two individual images; one for the default state and one for when the mouse is hovered over the image or link. However, it bears some advantages to use a single image by taking advantage of CSS image offsets.

Upload images for instant resizing using this site. Useful and quick