Sat Jul 07, 2012 2:12 pm
Just -
$ sudo apt-get update
$ sudo apt-get upgrade
This is a bit like windows update, its good to keep the OS up to date.
RPi Firmware.
If you don't need firmware patches at this very moment you don't need rpi-update. Its not available unless you install it and aside from this you can probably update your firmware without rpi-update.
Its probably on here somewhere what firmware updates are available and what they fix.
You can check your firmware version as follows to see if you need an update:
sudo /opt/vc/bin/vcgencmd version
My Rasp Pi shows:
Apr 18 2012 15:04:46
Copyright (c) 2012 Broadcom
version 310376 (release)