Install ruby-subexec by entering the following commands in the terminal:
sudo apt update sudo apt install ruby-subexec
Description:
mechanism for spawning a subprocess
Subexec is a simple library that spawns an external command. It has an optional timeout parameter, useful for libraries which are wrappers for external command line programs and which may sometimes fail ever to return control back to the original process.
Homepage: http://github.com/nulayer/subexec
Version: 0.2.3+gh-2
Section: universe/ruby