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Using the Ubuntu 12.04 Live CD, is possible not to install Grub? In previous versions, there was a checkbox called something like "skip grub installation", now in 12.04 this checkbox isn't there any more.

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Sorry, but I don't think I have any idea what you are asking. Grub is always part of an Ubuntu installation. Precisely what are you trying to do and how? Is your question something to do with an existing installation of a different operating system, if so, what is it. Please say what you have already and what you expect to be able to do. – barrydrake May 5 '12 at 15:26
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In previous versions of ubuntu (up to 11.04 I think) when installing the system there was a checkbox called something like "skip grub installation", now in 12.04 these checkbox there isn't any more – Matteo Pagliazzi May 5 '12 at 15:43
    
For installs that don't fit the streamlined approach of the live-cd, you need to use the alternate iso. Works like a charm, just not so pretty. – Egil May 5 '12 at 19:19
up vote 1 down vote accepted

Installing GRUB is the usually the best way to go, whether or not you're dual-booting, but to install Ubuntu 12.04 without GRUB, download the alternate CD for x86 or AMD64.

Run the install as normal, after the Select and install software step, the installer will run Install the GRUB boot loader on a hard disk. It will tell you what other operating systems, if any that it's found, and ask if it should install, at this point, choose Go Back, then in the installer menu that appears next, choose Continue without boot loader.

Please be aware that after installation you will have to configure your existing boot loader before you can boot your new installation of Ubuntu.

Edit: As ignis says below, an alternate install CD for Ubuntu 12.10 is not available, but you can still use the same method as listed above, with the same links, and upgrade from 12.04 to 12.10 after installation, alternatively you can run Ubuntu 12.10 from a live disc and start the installation with ubiquity --no-bootloader as mentioned in StefK's answer.

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12.10 and higher have no alternate CD. Workaround: download an older alternate CD, and do sudo apt-get dist-upgrade after reboot. That will upgrade the system to the latest version. – ignis Dec 31 '12 at 22:07
    
apt-get dist-upgrade only upgrades packages within a specific Ubuntu release. – pcworld Dec 20 '13 at 23:33
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Open terminal and type ubiquity -b all lower letters

This will open the installer and will install ubuntu with out the ubuntu bootloader known as grub,

  • Note : If you don't install Ubuntu's boot loader "Grub" you wont be able to boot Ubuntu, I've tried installing Ubuntu side by side windows, using the above step, then installing EasyBCD, then selecting "Grub 2" as the boot loader for the Ubuntu Part, I rebooted, to find I still could not boot in to Ubuntu with out Ubuntu having "Grub" within it's part, so I do NOT recommend following the above step, unless you know how to get around this, in which case, please post the magic bellow
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You can boot Ubuntu, even without the default Ubuntu's GRUB by installing grub2win on Windows. It does make a GRUB entry inside Windows' BCD. What did you only need to do is to make an entry to your Ubuntu installation, and points the entry to the partition where you install Ubuntu. – Aryo Adhi Apr 23 '16 at 17:39
up vote 13 down vote

Run the regular LiveCD and open a terminal. Run either ubiquity -b or ubiquity --no-bootloader.

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man ubiquity does not mention that option on 12.10, however ubiquity --help does. I guess it is a lack in the manual. – ignis Dec 31 '12 at 22:14
up vote 2 down vote

You can also open a terminal after booting the LiveCD and launch ubiquity with a proper switch, that disables GRUB installation. I forgot what it was called but ubiquity --help will tell you :) That worked for me, when I was trying to setup Ubuntu on my fakeraid PC and GRUB kept going belly-up.

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