Install libfile-pid-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libfile-pid-perl
Description:
Perl module for pid file manipulation
File::Pid manages pid files. It creates a pid file, queries the process within to discover if it's still running, and removes the pid file.
Homepage: https://metacpan.org/release/File-Pid
Version: 1.01-2
Section: universe/perl