Demo mode memory shortage

i have a 160.oo gigabyte hard drive with windows vista buisness. It had about 60 gigabytes free before i installed ubuntu using wubi with a 30 gigabyte file system and after installation i had 30 gigabytes left, but when i use demo mode it says that the ubuntu file system has only 1.4 gigs free.

can you give the output of:

lsb_release -a; df -h

Thanks

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04.1 LTS
Release: 12.04
Codename: precise
Filesystem Size Used Avail Use% Mounted on
/cow 1.5G 941M 563M 63% /
udev 1.5G 4.0K 1.5G 1% /dev
tmpfs 602M 892K 601M 1% /run
/dev/sda2 148G 114G 35G 77% /isodevice
/dev/loop0 696M 696M 0 100% /cdrom
/dev/loop1 667M 667M 0 100% /rofs
tmpfs 1.5G 28M 1.5G 2% /tmp
none 5.0M 0 5.0M 0% /run/lock
none 1.5G 516K 1.5G 1% /run/shm
/dev/sr0 4.4G 3.7G 725M 84% /media/UDF Volume

im not sure if thats what you were looking for but since startup i have added things like java, a 1 megabyte game, and skype.

ok and the output of:

uname -a; dpkg -l | grep linux-image

Thanks

Linux ubuntu 3.2.0-29-generic-pae #46-Ubuntu SMP Fri Jul 27 17:25:43 UTC 2012 i686 i686 i386 GNU/Linux
ii linux-image-3.2.0-29-generic-pae 3.2.0-29.46 Linux kernel image for version 3.2.0 on 32 bit x86 SMP
ii linux-image-generic-pae 3.2.0.29.31 Generic Linux kernel image

is that what you needed.

hello? i kinda need an answer soon because my windows installation if failing and i need a new os so i can do my school work. When you find a reason or solution can you please tell me as straight forward as possible so i know what to do or if to install it.

Looks fine, so your issue is free space. Is that correct?

yes i dont know what the heck is taking up so much space on the file system and i want to make sure when i install it i dont have low space.

so what i want to know is if i will still get this really low memory issue or some random huge file that takes up most of my space when i do a full installation.

i also discovered a new problem this morning i cant save things to a disk. i used a dvd-rw 4x 4.7gigs and it wouldnt save to the disk.

The DVD just has more apps and languages on the disk for offline use. The installed OS and liveCD OS are identical.

what i meant is i have ubuntu installed to my hard drive next to windows, and i had a dvd in my optical drive but couldnt write to it. but if thats not what you were saying then are you saying that when i install it completely it will be smaller?

the dvd in my optical drive had some of my important files on it but still had 750 megabytes on it and i tried to save a text file (about 1 byte) on the dvd and it would work.

i mean it wouldnt work

if it is alright with you and if you have a skype account i would like to speak to you there so we can get this done faster but if you would rather not or are busy i understand.

and to reiterate what i meant i used wubi.exe while in windows vista to install ubuntu next to windows in a 30 gigabyte file system. while running ubuntu in demo mode (wubi) i had a dvd in my optical drive which had some important files on it and it had about 750 megabytes left. But ubuntu wouldnt let me save anything to it. the dvd did not have ubuntu on it my hard drive did.

im going to reinstall ubuntu using wubi with a 15 gigabyte file system this time and i will tell you the results

ok so i reinstalled it and checked the ubuntu folder size, this time it was 15.3 or 15.4 gigs, then i re installed it again as 30 gig file system again and it was 29.9 gigs. the file that took most of the space is called root.disk.

Thanks actionparsnip, that solved my question.