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Hello guys! I have this problem for long time, and I can't solve it, so I wanted to ask u. I'm trying to install Ubuntu (Dual boot) on my computer. I'm installing thru wubi.exe. I'm pressing "Install inside windows" blabla, finishing the setup, and after the first restart when I select Ubuntu it says:
No root file system is defined.
Please correct this from the partitioning menu.
I need UBUNTU really right now! I have 1 HardDisk 160gb storage. Any help will be highly appreciated!
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I've never tried to install Ubuntu from windows.
Such a procedure shall work:
1. Find and install some partition tool for windows. For example Easus works fine.
2. Resize your windows parition, let's say on a half, and leave 80 Gb non formatted.
3. Boot from Ubuntu installation CD/DVD, follow the instructions.
4. When coming to partition question, choose install manually
5. Create partitions, would be good to create a swap partition, for example something as twice more than your RAM mb.
Choose the rest to be mount as / format as ext4, this partition will be bootable.
(or if you like, put /home on separate partition, /usr on separate partition, boot only / must be bootable.
This is a better practice.)
6. It will ask you that MS windows will be on the grub (maybe will not even ask, but will do)
Follow process till the end.
When finished, after starting your PC, Grub will show the option to boot ->Ubuntu or MS Windows
Now you need to choose Apply
within the program.
The program will reboot windows and do the resize of partition before the windows is loaded.
It may take some time, be patient.
Afterwards, go with installation of Ubuntu.
Of course, Ubuntu must be installed on those 20 Gb which are now unallocated.
You left 20 Gb free space , than make swap (this is virtual memory on windows), and else as / (root partition which will be bootable)
resolv 25 and Satyaveer Arya are referring to a dual-boot setup, where linux is installed on a separate partition, not a Wubi install into a directory in the Windows partition. So all those steps mentioned by resolv 25 don't apply in this case.
Distribution: Linux From Scratch. 64 bit. Kernel 4.3.3. KDE 4.14.10.
Dual booting can be done in various ways. However there is always a potential for damage to any pre-existing operating system.
One of the safest ways is to use separate disks, one for each operating system. That way you can physically detach a drive and be sure that the installation program for one OS is not damaging information used by another OS. You only need to do the detachment prior to the installation process. After your new OS has been installed, switch off the power (disconnect it!) and re-attach the original disk.
I use that method. One drive has XP and another has the version of linux that I run on my work station. I use the BIOS to select which drive to boot from (using one of the function keys). If I am booting the linux drive, I then use Grub to select between various different versions of linux (which use different kernel images).
My linux system gets access to data that XP knows about by having some FAT32 partitions. Both XP and linux know how to read and write FAT32.
If you have a laptop, then multiple drives may not be an option. In that case re-partitioning of the existing drive is called for. However then you have to be very careful not to break your existing system.
I think that, in general, you need to get familiar with making and using partitions. And really that is much safer if you have other drives available. So the whole exercise can be managed more easily with a desktop or tower arrangement.
Darkizzwow, if you feel confused about setup partition manually, when this question appear, there is an option: Use continuous free space (something like that), and Ubuntu will use this free space, create partition and finish the job.