[RUBY] Update RVM on AWS Cloud9

"RVM" is pre-installed in Cloud9 environment, but I have to update RVM when installing the latest stable version of Ruby, so make a note.

What is RVM

** RVM ** is an abbreviation for ** R ** uby ** V ** ersion ** M ** analger. Used to manage Ruby versions. For example, you can install, uninstall, switch versions, and so on.

Official site RVM: Ruby Version Manager - RVM Ruby Version Manager - Documentation

Install the key from the RVM site

To ensure security, RVM checks for signatures. If you do not have the key installed, leave it.

RVM: Ruby Version Manager - Copy the command from. It is convenient to triple-click.

In the Cloud9 console, paste and run the command after sudo (run with root privileges).

You have now installed the key.

Check the RVM version

rvm -v

It's 1.29.8 right now, but I want to make it 1.29.10!

Update RVM version

Update (upgrade) is a get command. rvm get <version>

If you want to update to 1.29.10, it will be as follows. rvm get 1.29.10

Now, specify the version and execute the get command.

Display the RVM version for confirmation. rvm -v You have now updated.

(Bonus) Display RVM help

Use this when you want to look up a command.

rvm help Or rvm Both are displayed.