curl -L http://cpanmin.us | perl – App::cpanminus
and then 
cpanm YAML::XS

##</code><code>##


Can't locate YAML/XS.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at urs.pl line 4.
BEGIN failed--compilation aborted at urs.pl line 4.