*note* This post deals with an experiment I was trying randomly in hopes of finding a more expeditious way to 'roll' or upgrade to the next development release (which is currently Trusty Tahr - 14.04)
The most commonly used standard and conventional method is to sudo sed...
Code:
sudo sed -i 's/saucy/trusty/g' /etc/apt/sources.list
and then
Code:
sudo apt-get update && sudo apt-get dist-upgrade
then
sudo apt-get update
sudo apt-get dist-upgrade
with the caveat of editing the Ubuntu.info file at /usr/share/python-apt/templates/ubuntu.info
Some members, including myself, commented at how rather slow this method was.
I then decided to rename the 'saucy-desktop-i386.iso' to 'trusty-desktop-i386.iso' and then zsync the file to see if it would work.
Code:
zsync -i ./trusty-desktop-i386.iso http://cdimage.ubuntu.com/daily-live/current/trusty-desktop-i386.iso.zsync
and for some reason ,as which with Ubuntu never ceases to amaze me, the zsync worked, installed to USB using SCD and successfully installed to hdd with the Ubuntu.info file being updated afterwards:
sudo apt-get update
sudo apt-get upgrade
Although my experiment was not very complicated it proved out that the development release can be appended to the last .iso release (or for that matter and previous iso release) and this makes for a very economic and expeditious way of updating/upgrading saving a tremendous amount of downtime and bandwidth.
This method of renaming is experimental. Although it may appear to be rock solid from my standpoint it may not be rock solid from the varying veiws or observations of others -so, as always, as is with development , this may bork your system.
regards..