Install ruby-kgio by entering the following commands in the terminal:
sudo apt update sudo apt install ruby-kgio
Description:
Kinder, gentler I/O for Ruby
kgio provides non-blocking I/O methods for Ruby without raising exceptions on EAGAIN and EINPROGRESS. It is intended for use with the Unicorn and Rainbows! Rack servers, but may be used by other applications (that run on Unix-like platforms).
Homepage: http://bogomips.org/kgio/
Version: 2.11.2-1
Section: universe/ruby