And if so, how?
The only way I found was by a new install, and I'd like to know if there is an alternative like in previous versions.
And if so, how?
The only way I found was by a new install, and I'd like to know if there is an alternative like in previous versions.
There are two ways to upgrade to 13.04 without loosing your data:
You will get a promt asking you to upgrade in a couple of days (2 weeks after release I think), or you can upgrade now by typing sudo do-release-upgrade
in a terminal
You can install over your current installation without formating the drive
Your data should not be overwritten, but it is good practice to back up your data anyway.
If you have a more complicated set up (such as separate /home partition) you can select "something else" and assing your partitions as you did before. But make sure not to put the checkmark to format you "/home" partition
An upgrade should preserve your data.
However you should make a backup of any important data.
Making a backup should not be considered optional, a best practice or recommended, I would say it is an absolute. If you need to buy an external drive, a bunch of USB sticks or whatever, this is something you just really really should do.
Regardless of version control systems or whatever, I always backup files before upgrades, running sed scripts, reorganizing files, etc.
Any task that might, conceivably mess up the files, will eventually do that. If it only has a 0.1% chance per day then once every 3 years it will (on average) happen.