Howto Convert Vmware Image to Virtualbox Image

eCryptfs is a POSIX-compliant enterprise-class stacked cryptographic filesystem for Linux.

Have you ever needed to wirelessly network a Windows PC’s directly to a Ubuntu machine? In other words, you lack a router, switch, or other networking mechanism, each PC has a wireless device and you need to trade a file or play a network game? Read on.

This program converts line endings of text files between MS-DOS and **IX formats. It detects binary files in a nearly foolproof way and leaves them alone unless you override this.

IPTraf is a console-based network statistics utility for Linux. It gathers a variety of figures such as TCP connection packet and byte counts, interface statistics and activity indicators, TCP/UDP traffic breakdowns, and LAN station packet and byte counts. IPTraf is an IP traffic monitor that shows information on the IP traffic passing over your network.

pngcrush is an optimizer tool for PNG (Portable Network graphic) files. pngcrush is an excellent batch-mode compression utility for PNG images. Depending on the application that created the original PNGs, it can improve the file size anywhere from a few percent to 40% or more (completely losslessly)