Can't install rvm

Question

I want to install RVM:

ubuntu@ext:~$ rvm
The program 'rvm' is currently not installed. You can install it by typing:
sudo apt-get install ruby-rvm
ubuntu@ext:~$ sudo apt-get install ruby-rvm
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package ruby-rvm

How can I do it?

Answer 1

To install RVM stable with ruby, run the following command:

\curl -L https://get.rvm.io | bash -s stable --ruby

_{Note: There is a backslash before curl. This prevents misbehaving if you have aliased it with configuration in your ~/.curlrc file.}

_Source

Answer 2

Follow these steps:

gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3

\curl -sSL https://get.rvm.io | bash
source ~/.rvm/scripts/rvm