Hello,
When I am installing RHEL using a USB there is an error that says "warning/dev/root does not exist". Please help me with what I should do?

See this: https://www.linuxquestions.org/quest...st-4175515886/

a warning is not an error.
is there an actual problem?

Hi Ondoho,
The problem is RHEL wont install and the message is /dev/root does not exist"

How did you create the USB drive?

The Windows tools do not work and the preferred method is a linux system using the dd command.

1 members found this post helpful.

Aside from the other advice given here, I'll ask two obvious questions:

• Have you paid for RHEL? (Because you really need to if you're going to use it. Not going to pay? Load CentOS instead.)
• More importantly: WHY are you loading RHEL? What is the need?

RHEL is designed for servers, sitting in server closets. They may not even HAVE a screen or keyboard attached to them, so support for 'consumer' hardware may be hit or miss. Getting it installed and functioning correctly for a new user on a laptop or home desktop may be challenging. And add to that the fact that using RHEL without paying means that you ALSO lose the ability to easily install software. Your package manager will be (essentially) useless, the software you're using will be lacking bug fixes/enhancements/security updates, and you WILL NOT be able to get them.

You don't say what version of RHEL you're using, but if this is just for your own learning experience, I'd strongly suggest loading something else. If you want to stay within the RHEL ecosystem, load Fedora. Otherwise, Mint, openSUSE, or Ubuntu would be MUCH better places to start.

Somewhat dramatic and very incorrect on two fronts. I am using Centos 7 right now. I was a long time Fedora user tired of the six month release schedule and 1 year support. I wanted to try a long term support release from the same family. Last year I installed both Centos 7 and Fedora 24 on a new SSD. There was no difference in installation difficulty at all as both installers use Anaconda. I actually preferred Centos 7 as it used older KDE4 instead of the KDE5 in F24. Except for using older stable LTS kernels the hardware support is the same as Fedora which is the experimental arm of RHEL. I had no problems with Centos 7 on my 'consumer' Z68. It may not work on the very latest hardware but then neither may Linux Mint which is based on Ubuntu LTS. RHEL/Centos has no problem with 'consumer' hardware just sometimes with the very latest HW.

RHEL/Centos is used on the desktop for many expensive commercial applications. Commercial applications want an OS to be supported for many years. For example Hollywood special effects software Autodesk Maya ( formerly Alias Wavefront used for Terminator 2 and many other Hollywood movies ) is available for Linux and is supported for RHEL/Centos with installation instructions on their website. There was even a thread on LQ by an OP who wanted to install it.

Not necessarily true.
https://www.centos.org/forums/viewtopic.php?t=47905

My guess is you are trying to boot to usb but should actually be trying to boot to a hard drive order choice. I'd need to know a lot more before we could guess better. Could be the usb controller isn't supported too.

Not necessarily true.

I have deleted that part of my message. However the page you linked does not explain what was actually causing the problem, only how it can be avoided. In that page their USB didn't work so they used the DVD which did. Other pages mention that you should use dd instead of Unetbootin but don't explain exactly how using unet messes up the image.

Sorry, I should of posted the link.
https://wiki.centos.org/HowTos/InstallFromUSBkey