how to down load red hat 7 iso from linux questio.org

You can't. Red Hat is a commercial enterprise. In other words, Red Hat costs money. You cannot (like most other distributions) simply download it for free.

Best regards,
HMW

A great alternative to Red Hat Enterprise is CentOS. CentOS is free to download.

Hello and welcome to the forum

As an additional thought, if purchasing a Red Hat support package is not an option, you can always use CentOS, which is nearly identical to RHEL, except that it's free of charge.

Regards...

Getting Red Hat EL is explained in detail at their site below. You do need a subscription to do a download. It is free to download with a subscription but is a 30 day trial version after which time you get no support and no updates of any kind unless you pay for it. Fees vary depending upon the usage. For these reasons, it would not be a very good idea to use it for anything more than testing to familiarize yourself with the system and certainly not use it for any business without paid support.

CentOS is probably a better option as it is basically a free version without the support and trademarks.

for the very old and very out of date RH7
-- that might be "fun"
redhat7 was released in September of 2000
almost 16 YEARS AGO !!!

you will need some rather OLD hardware to run it
and it has been unsupported for many many many years , over a decade since it was supported


RH7 from 2000 is here
https://archive.org/download/redhat-7.0_release
you will need both CD's
7.0-respin-disc1.iso
7.0-respin-disc2.iso

this predates using a dvd to install