how can i tell if apache 2 is prefork or worker?
 

I need to find out if my apache 2 MPM is in prefork mode or in worker mode on Debian Sarge, Fedora Core 1, and CentOS. How does one do that?

Not real clear what you are asking.

Perhaps what you are looking for is:

./httpd -l

which will list all the modules apache was compiled with, including the mpm.

See: http://httpd.apache.org/docs/2.0/mpm.html

You can take a look at he output of:

I keep getting an error any time I type the httpd command with either L or V flags:
I have tried to locate the folder where httpd might exist and can't seem to find it.

It's not in your path. That would be typical. That's why my original suggestion was `./httpd -l` -- assuming that you knew where it was and would cd there.

Is it running? If it is, you can look at the output of ps and see, e.g.:

http 8418 16083 0 14:59:08 ? 0:04 /usr/local/apache2/bin/httpd -k start -DSSL

which tells you what the path is.

If it is not running, you could check out the init script. I'm most familiar with Solaris and would look at /etc/init.d/apache. You could try `man apache` and see if that tells you where it expects its directories to be. Or you could do something like `find / -type f -name httpd`. That would take a while, but should work.