From: "coolesting d." Date: 2011-09-07T18:43:06+09:00 Subject: Re: openssl on Red Hat not installed # yum install openssl-devel.i686 openssl.i686 # cd /path/to/ruby_install_package/ext/openssl/ # ruby extconf.rb --with--openssl=/usr/bin/openssl --with--openssl-lib=/usr/lib/openssl # make && make install It works for me on CentOS, hoping this helps others. -- Posted via http://www.ruby-forum.com/.