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This installation description is for Ubuntu.

Curl is needed to install RVM. In case the system doesn’t have it:

apt-get install curl

An installation of RVM doesn’t require root privileges. RVM will install itself in a hidden .rvm directory in user’s home directory.

gpg –keyserver hkp:// –recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
\curl -sSL | bash -s stable

Now add this line to the ~/.bashrc file

source /.rvm/scripts/rvm

Then type that command (source ~/.rvm/scripts/rvm) or restart the terminal.

Install requirements. The system will ask for the password.

rvm requirements

You have installed RVM, but you don’t have any Ruby installed inside RVM. You can check this with rvm list command.

To remove RVM from your system just delete ~/.rvm directory. Then delete the lines source ~/.rvm/scripts/rvm and export PATH="$PATH:$HOME/.rvm/bin" (created by heroku?) from ~/.bashrc.