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I want to increase the disk space for Ubuntu that I installed using wubi. I followed the instructions in Unfortunately, these commands could not be executed :

du -h --apparent-size /media/win/ubuntu/disks/root.disk
fsck -f /media/win/ubuntu/disks/root.disk

The error message tells me:

cannot access `/media/win/ubuntu/disks/root.disk': No such file or directory
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up vote 1 down vote accepted

For that sort of resize you need to boot a live CD/USB and mount the NTFS partition containing the root.disk. Then use the full path to the root.disk in all the instructions.

In summary. You can't do that from a Wubi install and you have to know where the root.disk is.

e.g. you installed on C:\ and that happens to be /dev/sda3, then you would first mount /dev/sda3:

sudo mkdir /media/win
sudo mount /dev/sda3 /media/win

And then you can address the root.disk as: /media/win/ubuntu/disks/root.disk

If instead you want to do a resize while running the Wubi install, this alternate method will create a new duplicate root.disk: It takes more space (and takes more time) but you don't need to run it from a live CD.

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It seems that the NTFS partition is not available ubuntu@ubuntu:/media$ df -h Filesystem Size Used Avail Use% Mounted on /cow 1008M 151M 806M 16% / udev 999M 4.0K 999M 1% /dev tmpfs 403M 812K 402M 1% /run /dev/sdb1 3.8G 1.7G 2.1G 46% /cdrom /dev/loop0 667M 667M 0 100% /rofs tmpfs 1007M 8.0K 1007M 1% /tmp none 5.0M 4.0K 5.0M 1% /run/lock none 1007M 76K 1007M 1% /run/shm /dev/sda1 228M 28M 188M 13% /media/win – Nasreddine Mar 9 '13 at 6:54
The root.disk cannot on /dev/sda1 as that partition is only 228M in size. – bcbc Mar 9 '13 at 7:12
I found it using sudo blkid command. It is sda3. Thanks – Nasreddine Mar 9 '13 at 7:13

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