In order to run a virtual machine using qemu, you will need to use your sandbox directory.
Log on to a CSIL machine and cd into your sandbox directory. Create an hard disk image using the following command:
qemu-img create fedora.img 8G
Make sure you have a local iso file with an operating system on it. You may download one in this way:
To boot from the iso in qemu issue a command such as:
qemu-kvm -localtime -net user -net nic -m 256 -cdrom Fedora-20-i386-DVD.iso -hda fedora.img -boot d
After the installation has finished, you can boot your virtual machine with a command similar to:
qemu-kvm -localtime -net user -net nic -m 1024 -hda fedora.img -boot d