How to Lock Windows XP from Command Line

Start > Run type cmd

C:\> rundll32.exe user32.dll, LockWorkStation

Free and Easy Way to Merge PDF Documents

Recently when downloading a free, multi-part pdf copy of The Foxfire Book on Scribd it reminded me that there was a way in cygwin to merge those multiple copies into a single pdf, enter pdftk. It is extremely simple to merge with a single command.