用rvm切换红宝石打破厨师11.4.4刀命令

I have chef 11.4.4 which has ruby 1.9.1 installed. I want to install berkshelf but it requires ruby 1.9.2 or later. I installed ruby 2.0.0-p247 (latest stable) with rvm. When i run a knife command I get ...I have chef 11.4.4 which has ruby 1.9.1 install