To install Plack::Middleware::Session::SerializedCookie, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Plack::Middleware::Session::SerializedCookie
CPAN shell
perl -MCPAN -e shell install Plack::Middleware::Session::SerializedCookie
For more information on module installation, please visit the detailed CPAN module installation guide.