Issue:
Nodes don't show up as active in Moab, pbsnodes reports no nodes
Symptom:
When running commands such as showq, you may see a message such as, "0 of 250 nodes active", and pbsnodes returns no node information.
Solution:
This is only only possible solution, and these instructions may vary, depending on the Linux flavor: a reboot of the headnode may cause Red Hat to overwrite /etc/resolv.conf, leaving out the search statement. Add a SEARCH entry to /etc/sysconfig/network-scripts/ifcfg-<device>.conf (or DOMAIN, for older Red Hat versions).