Install aolserver4-core by entering the following commands in the terminal:
sudo apt update sudo apt install aolserver4-core
AOL web server version 4 - core libraries
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 provides the basic shared libraries which are needed by the daemon and are also useful for building add-on modules. It does not contain the AOLserver daemon, which is in aolserver4.