Can’t locate IO/Socket/SSL.pm in @INC

Can’t locate IO/Socket/SSL.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.10.1 /usr/local/share/perl/5.10.1 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10 /usr/local/lib/site_perl .) at ./slowloris.pl line 7.
debian/ubuntu

aptitude -V -R install libio-socket-ssl-perl libnet-ssleay-perl
centos

perl Can’t locate URI/URL.pm in @INC
yum -y install perl-libwww-perl

Can’t locate IO/Socket/SSL.pm

yum -y install perl-IO-Socket-SSL