Install libace-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libace-doc
Description:
C++ network programming framework - documentation
This package contains the ACE overview documentation, tutorials, examples, and information regarding upstream development.
Homepage: http://www.dre.vanderbilt.edu/~schmidt/ACE.html
Version: 6.4.5+dfsg-1build2
Section: universe/doc