I've installed RH Linux on a removable drive in my single user workstation. When I boot the Windows removable drive I have internet access. Not so with Linux. RH GUI system_settings->network configuration window indicates device ETH0 is inactive. These subwindow options are selected: (1) "activate device when computer starts", (2) automatically obtain IP address with dhcp". The workstation interfaces through a 4 port hub to a satellite modem (I'm in a very rural area). I need help! Thanks.

If you installed RHEL, I assume you are paying for support. Have you contacted Red Hat about this issue?

Beyond that, more information is needed.

Are you using a wired or a wireless connection ("eth0" commonly refers to the first wired ethernet port).

The reference to a four-port hub leads me to think you are using a wired connection. What is the ethernet chipset? (Under RHEL, the command lspci issued in a terminal should reveal this information for both the wired and, if present, wireless chipsets; you may have to issue this command as root.)

If you are not using a wired connection, it might help to test with one.

What is the make/model of the computer?

If you have not done so, you may wish to read this.

I've installed Red Hat 9 Linux, purchased via an amazon.com site. Contact with RH revealed that they don't support such purchases without a "subscription". I've not yet done that.
I have a "wired" connection from my basement office, supporting two workstations through the hub which is connected (wired) to a wireless router. That router is connected / wired to the satellite modem which is wired to the satellite antenna. I also use a laptop via a wireless connection to the router. The non-Linux workstation connects to the hub also. It is a Windows 7 Pro system.
When I boot Windows via its removable drive on this workstation in question (which does then permit internet access) the control panel->system->device manager->network adapters display indicates INTEL PRO / 1000 CT. There's also a 1394 net adapter. I don't know which is used by Windows for the LAN interface.
The workstation hosts a dual processor INTEL Pentium 4 3 GHZ, running Windows XP Professional installed 2005 (and no longer supported of course). The workstation in question predates my retirement.

If that is RedHat 9 it is probably very old and may not support newer hardware or have available support.

In addition to what frankbell asked, What is the output of:

Assuming that is as old as I suspect it is, although you would probably be able to make that work to a point on that older workstation, it would be seriously in need of security updates among other things. Depending on your intended use you almost certainly be better off downloading a newer Linux version rather than spending time trying to make that one work.

RedHat itself can be freely downloaded, but you will need a subscription to get support and updates.

However, you can freely download CentOS which is 99.9% RH compatible with updates, and plenty of online support, including here at LQ!

There are also many other GNU/Linux distros available that would run fine on older hardware, so it may be worth telling us more about your intended use and experience level, then asking for recommendations.

And welcome to GNU/Linux and LQ! Good luck!

uname -rvmio responds with: 2.4.20-8mp #1 SMP Thu Mar 13 17:45:54 EST 2003 i 686 i386 GNU / Linux

My singular purpose has been to employ this rarely used workstation as a Linux platform in support of data analysis for my daughter-in-law's doctoral dissertation. To that end I have anticipated installing / using PSPP and developing some C++ numerical analysis tools. Since I'm thus far unable to access internet with the Linux system I've used the Windows7 system for downloads, transferring downloaded files via CD to Linux. I began with the download and attempted build of PSPP. I've incrementally discovered that the PSPP installation needs other file downloads - 15 files thus far and I think the well hasn't yet bottomed out.
I'll certainly consider starting over with CentOS, particularly if there seems to be no solution to this internet access issue. Thank you for the suggestion.

RH 9 went end of life more then 10 years ago and is no longer supported. As stated it will not have support for modern hardware and as suggested go with CentOS.

The 1394 port is also known as firewire which is not used much anymore. The Intel PRO is the LAN port.

Yes, looks like PSPP is current and would 'like' to run on a current distro!
Hope your old 2003ish ws has 1G+ ram; most any [32bit] distro ok.

btw/OT idea: VirtualBox on Win7 host fwiw... Library book with Linux CD/DVD?
'Look inside' "Red Hat 9" [$0.01] books on Amazon (network howto) Jang/Negus

I've installed CentOS 7, having abandoned the Red Hat 9 effort. Internet access was immediately available via CentOS. Thanks very much for the valuable suggestion. Networking problem resolved!

Glad that worked for you, and thanks for the update!

You will be much happier with that, and better able to get current help when needed.

Good luck!