I have a laptop supports 64bit. I'm using Ubuntu 12.04 32 bit by a mistake I installed 32bit. Now I want to switch from 32 bit to 64 bit and a new version of Ubuntu 12.10 is also available so I want to install it.
Is there any easy way with out New Installation ?
I have a separate partition for Ubuntu of 40 Gb size if I reinstall the new 64 bit version on it will it remove my applications and other stuff from the other partitions. Like /home partition and /data partition.
Also tell how to make backup.