如何为Ruby和Rails设置PATH？

Question

是否有一个已知的解决方案？

WARNING: You don't have /Users/user/.gem/ruby/1.8/bin in your PATH, gem executables will not run.

我已添加：

echo 'export PATH="$PATH:/Users/spirosgerokostas/.gem/ruby/2.0.0/bin"' >> ~/.bash_login