Default Apache Installation Directory

[Danielb]

I'm having trouble locating my apache installation so I can
restart it as 'httpd -k restart' is not being recognized in
the terminal. I've tried:
which httpd
which apache
find apache /
find httpd /
And I still can't find the executable so I can restart
apache with out restarting the PC! I'm running the apache
that can with my Fedora Core 2 DVD distro so I'm assuming
its in a standard location somewhere is just being still a
bit of a linux n00b I can't work out how to be able to find
it!

Can anyone tell me how to find it or where its usually
installed at?

Cheers,

Daniel