In Unix these are shared object libraries. In this context, I believe .so is the file extension for extensions that can be loaded by web servers during runtime

In Unix these are shared object libraries. In this context, I believe .so is the file extension for extensions that can be loaded by web servers during runtime. I think the person in the story was trying to change the Apache2 configuration of all FE servers to load the wanted client library / .so file. - https://httpd.apache.org/docs/2.4/mod/mod_so.html https://httpd.apache.org/docs/2.4/mod/mod_so.html