Webmaster in a Nutshell, 3rd Edition By Robert Eckstein, Stephen Spainhour
Table of Contents
Chapter 18. Apache Configuration
ErrorLog
ErrorLog filename
[ server config or within <VirtualHost>]
Specifies the location of the error log file, either an absolute path or relative path to the ServerRoot directory if an opening slash (/) is omitted. The default setting is:
ErrorLog logs/error_log
Beginning with Apache 1.3, you can specify syslog if the system supports logging via syslogd.