Report: broken link to chad's site

From here:
http://www.ruby-doc.org/stdlib/libdoc/drb/rdoc/index.html

this one is broken:
http://www.chadfowler.com/ruby/drb.html

and this one has no article found:

File not found:
http://www.rubycentral.com/book/ospace.html

and I wonder there’s no eric’s link to:
http://segment7.net/projects/ruby/drb/