I'm trying to install Ubuntu. My system have pre-installed Windows 8. I made USB bootable and then I booted into Ubuntu from there and I am in TRY Ubuntu mode now, I am having a problem in installing Ubuntu. When I attempt install Ubuntu then it says:
No root file system is defined. Correct this from the partitioning menu.
You need to specify which partition will be root (represented with an slash /) in the partitioning screen. If you don't know how to do this go back twice, and select the automatic installation (the one that doesn't say "Something else...).
To specify the root partition you have to be in the partitioning screen, select the partition where you will install Ubuntu, and then click "Change...". You will be presented with the following:
Here, in mount point you should select /, click ok, check again everything, and then continue.