Downloading an Ubuntu ISO

Ubuntu is distributed over the Internet as DVD image (.iso) files. The GettingUbuntu page has links to the ISO image files, as well as other methods of getting Ubuntu.

If you have downloaded an .img file, please refer to the .img writing documentation.

Verifying the ISO integrity

Before burning a DVD, it is highly recommended that you verify the md5 sum or sha256 sum (hash) of the .iso file. For instructions, please see HowToMD5SUM and HowToSHA256SUM. For the current list of Official Ubuntu SHA256 hashes, see the SHA256SUMS file for the release you're using under (and optionally the PGP signatures in the SHA256SUMS.gpg file); hashes for the older MD5 algorithm are in the same directory. UbuntuHashes currently has only md5sums. Checking the hash ensures that the file was not damaged during the download process and is 100% intact.

Burning the ISO on to a DVD

Unlike a regular data file, the ISO file cannot be simply dragged and dropped or copied directly onto a disc. It needs to be burned in a specific way that expands/extracts the image so you have usable files on your disc.

To install Ubuntu from a DVD, you first need to burn the downloaded ISO image onto a DVD. This requires:

  • A working DVD burner (i.e. R/W drive)
  • A blank DVD. (recent Ubuntu versions do not fit on to CD any more)

Inexpensive "write once" DVD-Rs are a good choice for burning ISO images.

Burning from Windows

Windows 7

  1. Right-click on an ISO image and choose “Burn disc image”.
    • windows7_right.jpg

  2. Select a disk burner (drive) and press "Burn".
    • windows7_burn.jpg

If you check “Verify disc after burning”, it will verify that the ISO image has been burned correctly

2000/ XP / Vista / 7: Infra Recorder

  1. Download and install Infra Recorder, a free and open source image burning program.

  2. Insert a blank CD in the drive and select Do nothing or Cancel if an autorun dialog pops up.

  3. Open Infra Recorder and click the 'Write Image' button in the main screen.
    • Alternatively you can select the 'Actions' menu, then 'Burn image'.
      • infrarecorder3.png

  4. Select the Ubuntu CD image file you want to use, then click 'Open'.
  5. In the dialog, click 'OK'.

XP / Server 2003 / Vista: ISO Recorder

  1. Download and install the appropriate version of ISO Recorder.

  2. Insert an unformatted CD into your burner. (Note: one can burn DVDs with this tool only from Vista.)

  3. Open Windows Explorer, browse to your ISO file, right-click and choose "Next".
    • iso-recorder.gif

Burning from Mac OS X

Note: To burn most ISOs, you can use Apple's Disk Utility (Disk Copy in older versions).

  1. Launch Disk Utility (Applications → Utilities → Disk Utility).
  2. Insert your blank CD/DVD.
  3. Drag and drop your .iso file to the left pane in Disk Utility. Now both the blank disc and the .iso should be listed.
  4. Select the .iso file, and click on the Burn button in the toolbar.
    • macosx_disk-utility.png

  5. Ensure that the "Verify burned data" checkbox is ticked (you may need to click on the disclosure triangle to see the checkbox).
  6. Click on Burn. The data will be burned and verified.
    • macosx_disk-utility_burn.png

Burning from Ubuntu

The procedure may differ slightly depending on which version of Ubuntu you are using

  1. Insert a blank CD into your burner. A "CD/DVD Creator" or "Choose Disc Type" window might pop up. Close this, as we will not be using it.
    • ubuntu_1.jpg

  2. Browse to the downloaded ISO image in the file browser.
  3. Right click on the ISO image file and choose Write to Disc.
    • ubuntu_write_to_disk_1.jpg

  4. Where it says "Write disc to" you may have options such as "File image" as well as your CD drive. Choose your CD drive. Your CD drive may show as something like "BD-MLT UJ-210S"
  5. Select the write speed. If you are burning a Ubuntu Live CD (one that you may want to boot from), it is recommended that you write at the lowest possible speed.
  6. Start the burning process.
    • ubuntu_3.jpg

  7. After burning completed, verify that your CD contains multiple files and folders and not just the ISO file. This way you will know the process was performed correctly.
  8. If the standard CD burning application does not work, try Gnomebaker in stead.

See CdDvd/Burning if you would like to burn from the command line (terminal)

If the burning fails

If the CD writing fails, try writing at a slower speed. For better results, try the slowest burn speed reasonably possible. Most Gui tools have a "Properties" button to select speed but with Brasero those sorts of options appear after pressing the 1st "burn" button. This is the single most likely cause of problems but is much more widely known than Md5sum/SHA error-checking. Slower speeds ensure greater accuracy.

Checking the integrity of the finished DVD

The CDIntegrityCheck page describes how to verify the integrity of the finished disk. Please try your DVD as a LiveDVD. If your finished disk fails to boot when you restart your computer, please refer to the BootFromCD page.


BurningIsoHowto (last edited 2012-10-11 10:46:06 by yannubuntu)