Index of /MEDUSA
Name Last modified Size Description
Parent Directory 12-Apr-2013 12:23 -
Q. What is this MEDUSA thing?
A. A versatile installer CD that supports a variety of installations
including Red Hat Enterprise Linux (RHEL) 6.5/5.10, CentOS 6.5/5.10,
and Fedora (F19/F18). This installer supports both x86 and x86_64
architectures for all RHEL & Fedora installs.
In addition it includes bootable copies of Core which can help in a
variety of ways including getting a new machine through netreg prior
to installing whichever version of linux you prefer.
Q. Who is it intended for?
A. Mostly Iowa State on-campus folks will benefit from it. Installing
RHEL5, RHEL6, and Fedora over the network (at least from the default
locations) can only be done from ISU IP space. If you have alternate
locations for these installs (other network trees, ISOs on hard
drives, etc.) you can use it too.
Q. How do I get it?
A. The ISOs and its md5ums can be found at
You can use many tools to grab the files including popular web browsers,
curl, and wget. Check the date to be sure to get the most recent version.
For example to grab the ISO:
$ wget http://cyclops.iastate.edu/MEDUSA/medusa-2013-12-03.iso
$ wget http://cyclops.iastate.edu/MEDUSA/medusa-2013-12-03.iso.md5
Check for a valid md5sum:
$ md5sum -c medusa-2013-12-03.iso.md5
and if all went well you should see something like
Q. Now what do I do with it?
A. Grab a 3.5" CD (or a larger one will work too) and burn the image to
your CD. Again there are many ways to do this depending on your system.
Assuming a linux system something like the following should work.
$ cdrecord speed=4 dev=0,0,0 -data medusa-2013-12-03.iso
where the 0,0,0 is what is returned from
$ cdrecord -scanbus
for your CD burner.
Check the image you just burned ... one way is to mount the new image
somewhere, let's say it is mounted on /mnt/cdrom now. Then you can
$ mkdir /mnt/loop
$ mount -o loop medusa-2013-12-03.iso /mnt/loop
$ diff -r /mnt/cdrom /mnt/loop
Here no news is good news.
Q. Ok, I have the CD. Now what?
A. Boot a machine from the CD and pick something sensible from the menu.
Q: Do I need to enter "installation numbers" for RHEL5 installs?
A: Yes, make a note of the installation number next your choice from the
grub menu and enter it into the installer when prompted.
Q: Don't I need to use an activation key when I register?
A: Not any more for your personal groups, it is easier to just use your RHN
account username and password. You do still need to use an activation key
if the system is going into any university group other than your personal
Q: Do I need to get the bootstrap script and run it to connect to the Iowa
State University proxy server?
A: Yes. After your installation is complete you should obtain the bootstrap
script by running the following command:
# wget http://cyclops.iastate.edu/pub/bootstrap.sh
You should then run the bootstrap script as root with
# sh bootstrap.sh
For RHEL6 use
# wget http://cyclops.iastate.edu/pub/bootstrap-rhel6.sh
# sh bootstrap-rhel6.sh
Q: So what are the steps I need to do to install and configure a system
using medusa to work using the proxy server and Red Hat Network?
A. 1 - Acquire the medusa ISO and burn a CD as described above.
2 - Boot a machine with it and select the menu option for the distribution
you want to install.
3 - Answer the various questions that the Red Hat installer asks you.
4 - When the installer finishes you will be asked to remove the medusa
CD and reboot the system.
5 - When the machine comes back up for the first time you will be asked
to complete some additional configuration steps during the first boot.
Answer these questions as you desire and use your RHN account username,
something like isu-netID, and your Red Hat Network password to get the
system registered with Red Hat.
6 - Obtain and run the bootstrap script as described above.
7 - Run up2date -u or yum update to finish updating your system to have all
the current software on it.
Q: Something isn't working right. Who do I contact?
A: Unfortunately we can't test every possible combination of things people
might try to do with medusa and sometimes something doesn't work right.
If you have a problem using medusa please do take a minute to report the
problem to us at firstname.lastname@example.org. We will do our best to fix the problem
as soon as we can and may be able to help you get around the problem in