Sometime we stuck with some basic things in Apache. httpd command is very useful in this way.
To list active modules in Apache
root# httpd -t -D DUMP_MODULES
or
root# httpd -M
To list compiled in modules
root#httpd -l
To get virtual host lists
root#httpd -S
To test httpd configuration
root#httpd -t
To list active modules in Apache
root# httpd -t -D DUMP_MODULES
or
root# httpd -M
To list compiled in modules
root#httpd -l
To get virtual host lists
root#httpd -S
To test httpd configuration
root#httpd -t