To find the location where apache is installed and to print configuration file location, run the following command:
# httpd -V
Here is the output from my Fedora Core/RedHat (RHEL) Linux server:
Server version: Apache/2.0.54
Server built: Jan 17 2006 06:36:00
Server’s Module Magic Number: 20020903:9
Architecture: 32-bit
Server compiled with….
-D APACHE_MPM_DIR=”server/mpm/prefork”
-D APR_HAS_SENDFILE
-D APR_HAS_MMAP
-D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
-D APR_USE_SYSVSEM_SERIALIZE
-D APR_USE_PTHREAD_SERIALIZE
-D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D HTTPD_ROOT=”/etc/httpd”
-D SUEXEC_BIN=”/usr/sbin/suexec”
-D DEFAULT_PIDLOG=”logs/httpd.pid”
-D DEFAULT_SCOREBOARD=”logs/apache_runtime_status”
-D DEFAULT_LOCKFILE=”logs/accept.lock”
-D DEFAULT_ERRORLOG=”logs/error_log”
-D AP_TYPES_CONFIG_FILE=”conf/mime.types”
-D SERVER_CONFIG_FILE=”conf/httpd.conf”
HTTPD_ROOT points to default location /etc/httpd and line SERVER_CONFIG_FILE points to configuration file conf/httpd.conf. So the path is /etc/httpd/conf/httpd.conf
Source: http://www.cyberciti.biz/tips/where-does-apache-server-store-its-configuration-files.html