3. Logs and MonitoringIntroduction to Logging in Apache Default Apache Log Files Creating Log Formats Creating a Custom Log File Redirecting Logs to an External Program Logging Requests Conditionally Monitoring Who Is Linking to Your Website Monitoring Apache with mod_status Monitoring Apache with SNMP Analyzing Your Logs with Open-source Tools Monitoring Your Logs in Real Time Logging Requests to a Database Rotating and Archiving Logs Controlling IP Address Resolution Processing Logged IP Addresses Restarting Apache Automatically If It Fails Merging and Splitting Log Files Keeping Separate Logs for Each Virtual Host Common Log Entries |