What is the file size of the Ubuntu iso image? I have Limited internet, and don't want to use too much of it. I want to put it on a Disc or USB thumb drive and install it on a unused computer.
These are numbers are taken directly from the iso files I've downloaded. Also if you download your iso from http://releases.ubuntu.com/13.10/ or http://releases.ubuntu.com/12.04/ it lists the file sizes beside the names, in the directory browser at the page bottom.
Ubuntu 13.10 - Desktop X86-64 = 883 MB
Ubuntu 13.10 - Desktop X86-32 = 895 MB
Ubuntu 13.10 - Server X86-64 = 672 MB
Ubuntu 13.10 - Server X86-32 = 658 MB
Lubuntu 13.10 - Desktop X86-64 = 702 MB
Ubuntu 12.04 - Desktop X86-64 = 698 MB
Ubuntu 12.04 - Desktop X86-32 = 701 MB
Ubuntu 12.04.3 - Server X86-64 = 665 MB
Ubuntu 12.04.3 - Server X86-32 = 648 MB
Lubuntu 12.04 - Desktop X86-64 = 697 MB
Kubuntu 12.04.3 - Desktop X86-64 = 707 MB
Xubuntu 12.04.3 - Desktop X86-64 = 712 MB
Ubuntu 14.04 - Desktop DAILYBUILD-JAN-21-2014 X86-64 = 912 MB
All the releases of Ubuntu along with its official derivatives are linked at http://releases.ubuntu.com/. Navigate to the particular release you want to download.
Suppose you want to download the images for Precise (12.04), you would go to http://releases.ubuntu.com/precise/. This page contains all the latest images available for download for 12.04 in a table showing the names, last modified date, size and description for each image. "Size" is the column which answers your question.
Which image am I supposed to download?
* in the following list represents the release of Ubuntu (eg; 12.04.4 for the latest point release of Precise)
- For Desktop 32-bit: ubuntu-*-desktop-i386.iso
- For Desktop 64-bit: ubuntu-*-desktop-amd64.iso
- For Server 32-bit: ubuntu-*-server-i386.iso
- For Server 64-bit: ubuntu-*-server-amd64.iso
We can see that Desktop 64-bit and 32-bit are about 733 MB and 731 MB respectively and Server 64-bit and 32-bit are 679 MB and 661 MB respectively. (Here 1 MB = 1024 KB, so if your ISP calculates data as 1 MB = 1000 KB, do the maths as necessary).
Tip: If you want to save as much data as you can while downloading and already have an image of Ubuntu previously downloaded, you might want to use
zsync to update the iso.