Zachary Peterson writes "Ext3cow, an open-source versioning file system based on ext3, has been released for the 2.6 Linux kernel. Ext3cow allows users to view their file system as it appeared at any point in time through a natural, time-shifting interface. This is can be very useful for revision control, intrusion detection, preventing data loss, and meeting the requirements of data retention legislation. See the link for kernel patches and details."
If builders built buildings the way programmers wrote programs,
then the first woodpecker to come along would destroy civilization.