How to check which httpd.conf is used by apache in linux

Step one: Find the apache startup command:

ps -ef|grep httpd
root     10575   1  0 19:45 ?    00:00:03 /usr/sbin/httpd -k start
myuser   15356   2982   0   Jan19   ?   00:00:00   /home/apache/bin/httpd -f /home/apache/conf/httpd.conf -k start

If you see that the httpd command uses the -f option, you can directly get the configuration file directory.

If the httpd command does not use the -f option, such as:

ps -ef|grep httpd
root     10575     1  0 19:45 ?        00:00:03 /usr/sbin/httpd -k start
apache   10577 10575  0 19:45 ?        00:00:00 /usr/sbin/httpd -k start
apache   10583 10575  0 19:45 ?        00:00:00 /usr/sbin/httpd -k start
apache   10584 10575  0 19:45 ?        00:00:00 /usr/sbin/httpd -k start
apache   10587 10575  0 19:45 ?        00:00:00 /usr/sbin/httpd -k start
apache   10590 10575  0 19:45 ?        00:00:00 /usr/sbin/httpd -k start
apache   10591 10575  0 19:45 ?        00:00:00 /usr/sbin/httpd -k start

, perform the second step.

Step 2: Execute the httpd -S command to find out the configuration file path

/usr/sbin/httpd -S
VirtualHost configuration:
211.157.8.76:80        is a NameVirtualHost
default server wap.wapwu.com (/etc/httpd/conf/httpd.conf:1041)
port 80 namevhost wap.wapwu.com (/etc/httpd/conf/httpd.conf:1041)
port 80 namevhost wapu.wapwu.com (/etc/httpd/conf/httpd.conf:1052)
wildcard NameVirtualHosts and _default_ servers:
_default_:443          211.157.8.76 (/etc/httpd/conf.d/ssl.conf:88)
Syntax OK

From the log information output by apache, you can see that the configuration file is in the /etc/httpd/conf/ directory.