Linus Torvalds discusses version control
It's not very often that you get to see Linus Torvalds discussing anything at all for a full hour. Follow the link for a discussion about version control, git, and why CVS sucks.
Surprisingly to me, he's a bit of an unexciting presenter. The content is interesting, though.
ssh+2FA to all your machines, anywhere, without opening firewall ports.