I just noticed today that Kali is in 1.0.9 now. I just got my 1.0.8 to where I like, I don't want to install 1.0.9 from ISO and risk losing my settings, is there a way to update to the latest release from the command line?

Some Googling showed that some people recommend 'sudo do-release-upgrade' but that doesn't seem to be a valid command in Kali.

Any advice is appreciated,
Thank you