Followed the instructions at: https://github.com/Hexxeh/rpi-update/bl ... /README.md
I get a failure re certificates
"GitHub's SSL certificate isn't trusted. If you're on Debian, you can resolve this by typing:"
I'm on Debian latest official release So I tried as suggested:
sudo apt-get install ca-certificates
but that fails with:
Err http://ftp.uk.debian.org/debian/ squeeze/main openssl armel 0.9.8o-4squeeze7
404 Not Found