Install aolserver4-dev by entering the following commands in the terminal:
sudo apt update sudo apt install aolserver4-dev
AOL web server version 4 - development files
AOLserver is the web engine that powers America Online. It is capable of serving a very high number of users, and can host hundreds of virtual servers simultaneously within the same process. . It is similar in many respects to Zope, except based largely on Tcl. It is multi-threaded, and has a C API that can be used to extend its functionality. . This package contains header files and libraries needed to develop applications based on AOLserver.