On RedHat Enterprise Linux 6.5 (Santiago), for installing circos, you will need the following perl packages:
- Clone
 - Config::General
 - Font::TTF::Font
 - GD
 - GD::Polyline
 - List::MoreUtils
 - Math::Bezier
 - Math::Round
 - Math::VecStat
 - Params::Validate
 - Readonly
 - Regexp::Common
 - Set::IntSpan
 - Statistics::Basic
 - SVG
 - Text::Format
 - Time::HiRes
 
Here is the copy’n’paste version which stops on errors:
for module in GD::Polyline List::MoreUtils Math::Round Math::Bezier Config::General Clone Font::TTF::Font GD Math::VecStat Readonly Params::Validate SVG Regexp::Common Statistics::Basic Set::IntSpan Text::Format Time::HiRes ; do cpanm $module || break; done