I use RVM for days but I don’t really like it. Someday I found there is a replacement called rbenv and I just give it a try.

It’s really simple with the following steps.

• Clean your RVM environment:

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$ rm -rf ~/.rvm

• Please remove the following line from your Zsh or Bash environment. [[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # Load RVM function

• Quit your current terminal and open new one.

(Or just source ~/.zshrc or your refresh your bash settings at the same console.)

• Install ruby-build:

(Because ruby-build has rbenv-install command)

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$ cd; git clone git://github.com/sstephenson/ruby-build.git; cd ruby-build; ./install.sh

• Intsall rbenv:

(You must change .zshrc to .bash_profile if you use bash. Also, bash has no rehash command, you must use rbenv rehash to rehash your shell environment)

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$ git clone git://github.com/sstephenson/rbenv.git ~/.rbenv
$ echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.zshrc
$ echo 'eval "$(rbenv init -)"' >> ~/.zshrc
$ source ~/.zshrc
$ rbenv-install 1.9.2-p290
$ rehash
$ rbenv global 1.9.2-p290
$ gem install rails # just for test

refer and learn more rbenv commands:

1. https://github.com/sstephenson/rbenv
2. https://github.com/sstephenson/ruby-build