Display the modules compiled inside Apache
# httpd -l Compiled in modules: core.c prefork.c http_core.c mod_so.c
Display both static and dynamic module loaded by Apache
When you pass option -l, to httpd, it will display only the static modules. Passing option -M, will display both static and shared modules as shown below.
# httpd –M Loaded Modules: core_module (static) mpm_prefork_module (static) http_module (static) so_module (static) auth_basic_module (shared) auth_digest_module (shared) authn_file_module (shared) authn_alias_module (shared) Syntax OK