Ruby 1.9.2 keeps reverting back to 1.8.7 after installing it using RVM

I installed Ruby 1.9.2. I used rvm use 1.9.2 and then when I type ruby -v it says 1.9.2. Then when I quit terminal and reopen it, it says开发者_如何学JAVA 1.8.7 again.

What am I doing wrong?

Your default ruby is most likely not set to ruby 1.9.2. Try:

rvm --default use 1.9.2

Also if you want to see all ruby versions installed, you can run 'rvm list'. The default ruby is prefixed with a => symbol, as shown below.

$ rvm list

rvm rubies

   ruby-1.9.1-p243 [ x86_64 ]
=> ruby-1.9.2-p136 [ x86_64 ]
   ruby-1.9.2-p180 [ x86_64 ]

Once you switch over using rvm --default use 1.9.2, be sure to check your gem list. Once you switch over, your gem list will be almost empty.

Additionally, you can check to see more information regarding what version of ruby and gemset you're using with the command rvm info.

If it is in fact empty, simply install rails with the command gem install rails. Be sure to not use sudo with this command.