Install gap-io by entering the following commands in the terminal:
sudo apt update sudo apt install gap-io
Description:
low level C library IO bindings for GAP
GAP is a system for computational discrete algebra with particular emphasis on computational group theory, but which has already proved useful also in other areas. . This package allows GAP to access UNIX I/O C-library functions.
Homepage: http://www.gap-system.org/Packages/io.html
Version: 4.5.1+ds-1
Section: universe/math