How can I tell which config file Apache is using?
Solution 1:
With any *nix application, the easiest method is to query the binary itself. In the case of httpd, I'd imagine the process would be something like this:
$ whereis httpd
/usr/sbin/httpd
$ /usr/sbin/httpd -V
Server version: Apache/2.2.11 (Unix)
Server built: Jun 17 2009 14:55:13
Server's Module Magic Number: 20051115:21
Server loaded: APR 1.2.7, APR-Util 1.2.7
Compiled using: APR 1.2.7, APR-Util 1.2.7
Architecture: 64-bit
Server MPM: Prefork
threaded: no
forked: yes (variable process count)
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_FLOCK_SERIALIZE
-D APR_USE_PTHREAD_SERIALIZE
-D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D DYNAMIC_MODULE_LIMIT=128
-D HTTPD_ROOT="/usr"
-D SUEXEC_BIN="/usr/bin/suexec"
-D DEFAULT_PIDLOG="/private/var/run/httpd.pid"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
-D DEFAULT_LOCKFILE="/private/var/run/accept.lock"
-D DEFAULT_ERRORLOG="logs/error_log"
-D AP_TYPES_CONFIG_FILE="/private/etc/apache2/mime.types"
-D SERVER_CONFIG_FILE="/private/etc/apache2/httpd.conf"
As you can see - my OS X says the binary, if not directed otherwise, will use the config file: /private/etc/apache2/httpd.conf
If that doesn't help, perhaps Christopher's suggestion of find is the next step.
Solution 2:
There's another serverfault question regarding this. If you're using a debian based server you can use apache2ctl
to determine which config file is being used:
apache2ctl -V
How to find out which httpd.conf apache is using at runtime