Calculate netmask in Perl

This is a small code snippet I wrote along time ago for a bigger framework I’ve created. No extra modules are required. It calculates the netmask of a network based on the network address and network bit (CIDR notation).

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Perl script:

A small script I wrote to see how fast a file grows (for instance when it’s being copied from one partition to another, disk to disk, network to network, …)