RVM is a command-line tool which allows you to easily install, manage, and work with multiple ruby environments from interpreters to sets of gems.

This package installs rvm with some defaults:

• stable rvm is used;
• rvm is installed using mixed-mode install: usable by all users on the system, with isolated rubies/gemsets in user's $HOME (see more here);
• rvm is installed into /usr/share/rvm (as Debian/Ubuntu convention);
• automatic updates provided by a Ubuntu PPA;

Additionally some old packages required to build old ruby binaries (like libssl1.0-dev) are automatically available in the PPA too.

You need software-properties-common installed in order to add PPA repositories.

If not installed, open a terminal (Ctrl+Alt+T) and run:

sudo apt-get install software-properties-common

Open a terminal (Ctrl+Alt+T) and run:

sudo apt-add-repository -y ppa:rael-gc/rvm
sudo apt-get update
sudo apt-get install rvm

Add your user to rvm group ($USER will automatically insert your username):

sudo usermod -a -G rvm $USER

Now, in order to always load rvm, change the Gnome Terminal to always perform a login.

At terminal window, click Edit > Profile Preferences, click on Title and Command tab and check Run command as login shell.

A lot of changes were made (scripts that needs to be reloaded, you're now member of rvm group) and in order to properly get all them working, you need to reboot (in most cases a logout/login is enough, but in some Ubuntu derivatives or some terminal emulators, a shell login is not performed, so we advise to reboot).

Now enable local gemsets. Open a terminal (Ctrl+Alt+T) and run:

rvm user gemsets

Now you're ready to install rubies. Open a terminal (Ctrl+Alt+T) and run:

rvm install ruby

RVM complete instructions are available at RVM repository: https://github.com/rvm/rvm

Additionally you can check manual pages too: open a Terminal (Ctrl+Alt+T) and run:

man rvm

After install RVM, your user was added to a new group, new environment files were created, etc. Usually a logout, login is enough. But in case you're still facing some issues (usually due terminals not running login shells, etc), just try a system reboot.

If you're facing the following error:

Cannot add PPA: 'ppa:~rael-gc/ubuntu/rvm'.
ERROR: '~rael-gc' user or team does not exist

Sounds like you're under a proxy. Please, follow instructions to add-apt-repository to work through a proxy.

Fine. First install the rvm-installer keys:

gpg --keyserver hkp:https://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

Then run:

rvmsudo rvm get master

If you already rebooted, and you're facing any file permission issues during any RVM usage, like:

• Following files may be not writable
• sudo is needed or
• Cannot utime: Operation not permitted

You can fix it with:

rvmsudo rvm cleanup all
rvm fix-permissions

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