how to list site availble list apache in ubuntu code example

Example 1: apache show active sites

# apache2ctl -S   [On Debian/Ubuntu]
# apachectl -S    [On CentOS/RHEL]
OR
# httpd -S

Example 2: find apache virtualhost file

# apache2ctl -S   [On Debian/Ubuntu]
# apachectl -S    [On CentOS/RHEL]
OR
# httpd -S