when i changed my VPS's hostname, then httpd stopped running, so i go to check error log and found sth like :
QUOTE
7537 [Mon Apr 17 20:16:10 2006] [warn] RSA server certificate CommonName (CN) `plesk' does NOT match server name!?
7610 [Mon Apr 17 21:39:47 2006] [alert] (EAI 2)Name or service not known: mod_unique_id: unable to find IPv4 address of "new.host.name"
7610 [Mon Apr 17 21:39:47 2006] [alert] (EAI 2)Name or service not known: mod_unique_id: unable to find IPv4 address of "new.host.name"
later on, i rebooted the whole node, httpd resumed working right after the reboot, and the content in /etc/hosts were recovered back with ev1's host name.
interesting.