There is an ongoing outage on the primary CPAN mirror. It is possible to work around the issue by using MetaCPAN as a mirror.
NAME
debug - debug module
SYNOPSIS
cdif -Mdebug
Module Install Instructions
To install App::sdif, copy and paste the appropriate command in to your terminal.
cpanm App::sdif
perl -MCPAN -e shell
install App::sdif
For more information on module installation, please visit the detailed CPAN module installation guide.