Create Bootable Centos Usb From Windows

Starting with CentOS 6.5 and 7.0 the preferred way to create a USB stick to use as install media is by using dd (example below). You should always use the latest iso image for the version you want to install: currently 6.10, 7.8.2003 and 8.2.2004.

The CentOS Project publishes a full list of the sha256sums for each iso file. These can be found in the release notes for each new version and also in a text file located in the same directory that you obtained the iso image from. You should check that your downloaded copy has a sha256sum that matches the published one to eliminate corrupted media install problems. On Windows you can use the command certutil -hashfile c:UsersJDoeDownloadsCentOS-8.2.2004-x86_64-dvd1.iso SHA256 to perform this checksum. On linux, use the sha256sum command to do the same job.

Create Bootable Centos Usb From Windows

CentOS 7 is out and I wanted to test it on real hardware. Unfortunately most of current methods to transfer bootable ISO to USB key in MS windows environment do not work (see quote below) or boots, but does not recognize installation media in case of Fedora LiveUSB Creator (suggested in RHEL 7 Installation guide). Microsoft has its own tool to create bootable USB drive but it has its own set of pros and cons. If you are looking for an error-free bootable media creating tool then use the Rufus. It is a completely free and open-source application and I can say it is the best tool to create a bootable USB drive. If you plan on installing Windows on a Mac via Boot Camp, don’t bother creating a bootable USB drive in the usual way. Use your Mac’s Boot Camp tool to start setting things up and it will walk you through creating a bootable Windows installation drive with Apple’s drivers and Boot Camp utilities integrated.

Motivation

Many recent systems, particularly netbooks and small notebooks, may not have a CD or DVD drive and a network install may be difficult, impractical, or impossible, depending on network connectivity and installer support for the available network hardware. This procedure allows a CentOS install without network connectivity and with no media other than a bootable USB device and the target system disk.

CentOS release 6 (6.5 or newer) and CentOS 7 and 8

Starting with CentOS 6.5, one can install from USB keys by simply transferring the desired ISO using dd.

For example, assuming your USB stick is seen as /dev/sdz (please double check what yours is, do not blindly assume /dev/sdz as you may overwrite something irretrievably):

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Create Centos 7 Bootable Usb From Windows 10

You must write to the entire device and not a partition on it (so, /dev/sdz not /dev/sdz1)

When asked for the media to install from, select 'hard disk' and then the device corresponding to the USB key.

Create Centos 8 Bootable Usb From Windows 10

Make sure you select as destination the device corresponding to the USB key (/dev/sdz in the above example) and not a partition(such as /dev/sdz1)

Exactly the same method works for CentOS 7. Moreover, the CentOS 7 installer image has a special partitioning which, as of July 2014, most Windows tools do NOT transfer correctly leading to undefined behaviour when booting from the USB key.

Applications known (2019) that do NOT work are: unetbootin, multibootusb and universal usb installler - do NOT use these. Also Rufusdoes not work correctly if the wrong options are chosen so the tool is best avoided.

  • Confirmed as functioning correctly (2019) are:
  • Fedora LiveUSB Creator

  • Win32 Disk Imager

  • Rawrite32

  • dd for Windows.

If you are experiencing problems installing CentOS from a USB stick and you used a utility other than dd on linux or the 4 listed above as 'working', then recreate it with one known to work before you try anything else.

If using a version of Windows newer than 7, make sure you unmount the USB drive first (formatting it prior to launching the disk copier is one way to accomplish that), otherwise Windows might refuse to write on the stick, bailing out with the 'can't write to drive' error message.

If using dd for Windows, run dd --list and look carefully at the list of NT Block Device Objects and use the one that looks like ?DeviceHarddisk1Partition0 where the description is something like Removable media other than floppy. Block size = 512. Be very careful about which output device you pick or you may overwrite something you did not intend to! On my machine I ran dd if=CentOS-7.0-1406-DVD.iso of=?DeviceHarddisk1Partition0 - your device names and command may vary accordingly!

Create Centos 8 Bootable Usb From Windows 10

Previous versions of CentOS 6

The first thing you should do is ask yourself 'What on earth am I doing, installing something that is more than 5 years old?'. Beware that only the very latest CentOS releases are supported. We strongly advise you to not install anything but the latest minor release. Therefore the following methods should no longer be attempted unless you have a very very good reason to install an old and unsupported release.

An end user recommends the following approach for CentOS-6, using livecd-iso-to-disk from livecd-tools with DVD1. This has been tested with livecd-tools-13.4-1.el6 from EPEL. Thanks to forum user AndrewSerk for the recommendation in a forum post. See also the notation of a need for installation of qemu in this mailing list post.

Create bootable usb for windows 10 install

Create Bootable Centos Usb From Windows 7

Create Bootable Centos Usb From Windows

Older Method

Make Centos Bootable Usb

Now removed as no-one should install CentOS versions older than 6.5

  • This page was created by PhilSchaffner. Other Wiki contributors with edit rights are invited to make corrections or additions.

CentOS 7 is out and I wanted to test it on real hardware. Unfortunately most of current methods to transfer bootable ISO to USB key in MS windows environment do not work (see quote below) or boots, but does not recognize installation media in case of Fedora LiveUSB Creator (suggested in RHEL 7 Installation guide).

CentOS 7 installer image has a special partitioning which, as of July 2014, most Windows tools do NOT transfer correctly leading to undefined behavior when booting from the USB key. Applications known (so far) to NOT work are unetbootin and “universal usb installler”.

After applying method of trial and errors I’ve discovered that best tool to transfer ISO to USB key is Win32DiskImager.
Note: Writing ISO image to USB drive overwrites all data on the drive.
Put the path to downloaded ISO image in image file(1), choose USB key drive letter (2) and press write(3).
Now you are ready to boot and install from your USB key.

Create Bootable Centos Usb From Windows

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