さくらにRailsインストール

rubygems入れてから

%gem install rails --remote

で。

Install required dependency rake? [Yn]  Y
Install required dependency activesupport? [Yn]  Y
Install required dependency activerecord? [Yn]  Y
Install required dependency actionpack? [Yn]  Y
Install required dependency actionmailer? [Yn]  Y
Install required dependency actionwebservice? [Yn]  Y
Successfully installed rails-1.2.3
Successfully installed rake-0.7.3
Successfully installed activesupport-1.4.2
Successfully installed activerecord-1.15.3
Successfully installed actionpack-1.13.3
Successfully installed actionmailer-1.3.3
Successfully installed actionwebservice-1.2.3
Installing ri documentation for rake-0.7.3...
Installing ri documentation for activesupport-1.4.2...
Installing ri documentation for activerecord-1.15.3...
Installing ri documentation for actionpack-1.13.3...
Installing ri documentation for actionmailer-1.3.3...
Installing ri documentation for actionwebservice-1.2.3...
Installing RDoc documentation for rake-0.7.3...
Installing RDoc documentation for activesupport-1.4.2...
Installing RDoc documentation for activerecord-1.15.3...
Installing RDoc documentation for actionpack-1.13.3...
Installing RDoc documentation for actionmailer-1.3.3...
Installing RDoc documentation for actionwebservice-1.2.3...

予想以上にあっさり成功・・・