A user reported that on his Fedora 16 x86_64 Linux workstation he could not obtain a hostid using the flexlm utility lmhostid or Artwork's hostinfo utilities.
Open the file, /lib/udev/rules.d/71-biosdevname.rules, in a text editor.
uncomment the line following:
# uncomment the next line for biosdevname to be off by default
Then
cd /etc/sysconfig/network-scripts/cp ifcfg-em1 ifcfg-eth0
Edit the ifcfg-eth0 file to change em1 to eth0
Finally Reboot and run hostinfo or lmhostid again.