$ sudo apt-get update
$ sudo apt-get install libfile-flock-retry-perl 

libfile-flock-retry-perl is installed in your system.

Make ensure the libfile-flock-retry-perl package were installed using the commands given below,

$ sudo dpkg-query -l | grep libfile-flock-retry-perl *

You will get with libfile-flock-retry-perl package name, version, architecture and description in a table

libfile-flock-retry-perl package basic information: