There are already a couple of guides online already about this, but none of them seemed complete or at least I had to do some extra digging to solve things perhaps unique to my setup.
Here is what I have done to update PHP5.2 to PHP5.3 using apt-get;
You will need to execute the following commands as root or sudo them.
- Back everything up.
- Make sure everything is backed up (seriously).
- Add some lines to your sources list
- Request some public keys
- Update your system
(optional, I had to do this for my GD library) update php5-gd
apt-get -f install php5-gd
- Test your sites.
- Take a new backup with your new setup.