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Errors During Start-up

If Apache suffers a fatal problem during startup, it will write a message describing the problem either to the console or to the ErrorLog before exiting. One of the most common error messages is "Unable to bind to Port ...". This message is usually caused by either:

* Trying to start the server on a privileged port when not logged in as the root user; or
* Trying to start the server when there is another instance of Apache or some other web server already bound to the same port.

For further trouble-shooting instructions, consult the Apache FAQ.