Dear all, The below is my steps to setup RedHat/CentOS domU on OpenSolaris with ISO image.Although there are some guides to describe how to install Linux on domU,but their install media are from http or OpenSuSe image. I find there is some different from RedHat ISO image. 1) $pfexec svcadm enable svc:/network/nfs/client:default # I find the nfs client is disabled by default, this issue spent me much time to find it. 2) $pfexec lofiadm -a ./rhel-server-5.4-X86_64-dvd.iso # If you mount the iso image with the command "mount -F hsfs", it will tell me the image is not the hsfs format. I googled this issue, one said this is because opensolaris is used new image format, but RedHat has not updated the format. But another said the opensuse image can be mounted by hsfs format. I find we can load the RedHat/CentOS image as loopback file driver at first. 3) pfexec mount -F hsfs /dev/lofi/1 /mnt # Now we can mount the loopback file driver with hsfs format. 4) pfexec share -o ro /mnt # Share the directory /mnt with read only 5) pfexec virt-install --paravirt --nographics --name vm01 --ram 512 --os-type=linux -f /export/home/hejun/vhost/vm01 -l nfs:192.168.0.11:/mnt # the installation source is nfs directory. One said the host name must meet FQDN ,but there is not dns service in my network. If I use "nfs:hostname:/mnt", the RedHat installation can''t find nfs server, you need to tell it ip address again. So you can add the ip address on the command option of virt-install. I follow the above step setup the CentOS 5.4 X84 and RedHat 4.7 X86 successfully. I hope some information is useful for you. -Hejun -- This message posted from opensolaris.org