reinstall every gem for each ruby version?
问题 I just installed Ruby 2.0.0 using rbenv and set it to the global ruby version for my system. Since 2.0 is compatible with 1.9.3, I tried to start up a Rails project with it, but got the following error. I did rbenv rehash after installing 2.0 The `rails' command exists in these Ruby versions: 1.9.3-p327 Does this mean that every gem I installed on my system with 1.9.3 has to be reinstalled if I wish to use it with 2.0? 回答1: Yes. Rbenv (and RVM) have separate "gem home" directories for each