Hacking is increasing, and it is easier than ever for your machine to be invaded. The problems are usually caused by one of these:
When you install a new machine, you need to use a recent, reputable distribution and patch it before you connect to the internet. This talk contains nothing new, just some reminders of good practice.
CSSC is the GNU project's clone for the Unix SCCS suite. The talk explains what this is, how it differs from CVS and RCS, why I came to write the GNU version of SCCS. It also glances at Bitkeeper and other alternatives.