I have a laptop with Ubuntu installed and used the "Erase disk and install Ubuntu" option which means my system now only has 2 partitions: main and swap partition.
Now I need to install a new system,but want to keep some important data. I think the solution is creating a new partition a copy important data into that partition. But I don't know exactly what to do because I am new to Linux.
/home
even if in the same partition since a lot of releases... And to the OP: Backup. Always. Before doing anything. The simple fact you have to ask this question mean you have a problem. Backup!