How to find the path of apache config file - apache

Question

I want to add some configuration in my Apache Web server configuration file so, anyone would help me with a command in Linux/Ubunbtu.

Answer 1

First find your httpd processes:
ps -ef | grep httpd
root 14124 1096 0 21:46 ? 00:00:00 /opt/apache/bin/httpd -k start
httpd 14125 14124 0 21:46 ? 00:00:00 /opt/apache/bin/httpd -k start
httpd 14126 14124 0 21:46 ? 00:00:00 /opt/apache/bin/httpd -k start
httpd 14127 14124 0 21:46 ? 00:00:00 /opt/apache/bin/httpd -k start
httpd 14240 6263 0 21:49 pts/0 00:00:00 grep --color=auto http
This will tell you:
the path to the httpd process. Here /opt/apache
Maybe the name and path of the configuration file, as an argument to the httpd process. The httpd process would then be started with the -f CONFIG-FILE argument.
In case 2., you are done!
In case 1, go to the directory the httpd process is from and run this:
cd /opt/apache/bin
./apachectl -V
Server version: Apache/2.4.37 (Unix)
Server built: Jun 21 2019 21:32:47
Server's Module Magic Number: 20120211:83
Server loaded: APR 1.6.5, APR-UTIL 1.6.1
Compiled using: APR 1.6.5, APR-UTIL 1.6.1
Architecture: 64-bit
Server MPM: worker
threaded: yes (fixed thread count)
forked: yes (variable process count)
Server compiled with....
-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 DYNAMIC_MODULE_LIMIT=256
-D HTTPD_ROOT="/opt/apache"
-D SUEXEC_BIN="/opt/apache/bin/suexec"
-D DEFAULT_PIDLOG="logs/httpd.pid"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
-D DEFAULT_ERRORLOG="logs/error_log"
-D AP_TYPES_CONFIG_FILE="conf/mime.types"
-D SERVER_CONFIG_FILE="conf/httpd.conf"
And there you have it! The last line: -D SERVER_CONFIG_FILE="conf/httpd.conf" tells you that the configuration file is httpd.conf in the conf directory. Since it is an absolute path, look at the value of HTTPD_ROOT to know where the root is for this Apache. Here it is -D HTTPD_ROOT="/opt/apache".
So the full path is: HTTPD_ROOT/SERVER_CONFIG_FILE. Here, /opt/apache/conf/httpd.conf.
Another method:
cd /opt/apache/bin
./httpd -S
Hope this helps!