Install APXS in Redhat Linux

APache eXtenSion tool (APXS) is a tool for building and installing extension modules for the Apache HyperText Transfer Protocol (HTTP) server, to build a dynamic shared object (DSO) from  object files which then can be loaded into the Apache server under runtime via the LoadModule directive from mod_so.

To  Install apxs in Redhat Linux
sudo yum install httpd-devel 
sudo updatedb
 locate apxs 
 apxs application will be in
/usr/sbin/apxs

To use the APache eXtenSion tool (APXS) to compile and install this
object as a dynamically shared object (DSO), for example
apxs -i -c mod_auth_cas.c