installing ubuntu
 

Have already made a partition on my W7 to install with live CD, but I got the message : no root file system is defined. Already looked at several posts for a solution, but didn't help. E.g. what is a 'mount' field, where I should write / ?
many thanks for your help
miramarcos

There is a step during stallation in which you tell the installer where you want the new software to be installed. All you need to do is select the partition that you had previously created.

Good luck to you.

Isn't it displaying the list of partitions to choose from?

In the Allocate Drive Space window you need to select the partition to highlight it then click the Change tab just below that window. This will open a new window 'Edit a Partition' where you have options to change the size, set the filesystem type by clicking the down arrow to the far right of 'Use as', select to Format the partition and set the mount point by clicking the down arrow to the far right of the Mount point box. It should show several options and the first one should be the root symbol: /. Click it and click OK to proceed.

Have a 241 GB HP compaq (C), with factory image (D) of 8,53 GB and System (?), made a new partition of 48,1 GB (F) for installing ubuntu. OS W7 Home Premium SP 1. During installation I come to 'GParted' which hasn't got the choice to 'delete' or 'add', only a + and -, change and revert ,so I guessed - = delete ? to get this partition unallocated or free space, forward in 'install' gives the error 'no root filesystem is defined'. By quiting, the bios screen came up with several messages next to those (OK) and went down until .... unmounted.
Because I already took out the live CD, maybe I should have left it in, in order to get the root filesystem ? I don't think I got the allocate drive space part. Many thanks for your kind assistance,
miramarcos

When booting live-cd got "Try Ubuntu" then open terminal & try:
or
& post it here

The easiest way to install Ubuntu on your system is to not create a partition for it (it is recommended that you have two partitions for Linux anyways, / and swap). Just delete that partition using the Windows partition manager and start the installation again. When it comes to partitioning just choose the option that let's the installer use the free space automatically.

partition no need
 

:):hattip:Thank you for your suggestion. I choosed -alongside windows- and got it installed !
miramarcos