How do I use another version of Ruby?

How do I install a new version of Ruby?

Get started with rbenv

  1. List the installed Ruby versions. To list the installed Ruby versions in your machine with rbenv, run the following command: rbenv version. …
  2. Install a Ruby version. To install a new Ruby version, use the rbenv install command: rbenv install VERSION. …
  3. Use a specific Ruby version for a project.

How do I change the project version in Ruby?

ruby-version file in your current directory, it doesn’t also load that version for you. You’ll need to set it and then cd .. && cd – to have the rbenv shim pick up that version. rbenv local VERSION usually picks it up immediately.

How do I switch from Ruby to Rbenv?

2 Installation

  1. Add ~/. rbenv/bin to your $PATH for access to the rbenv command-line utility. …
  2. Add rbenv init to your shell to enable shims and autocompletion. …
  3. Restart your shell so the path changes take effect. …
  4. Install Ruby versions into ~/.rbenv/versions . …
  5. Rebuild the shim binaries.
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How do I install multiple versions of Ruby on Windows?

If you’re trying to run multiple Ruby versions on Windows you should give uru a try.

  1. Step 1: Install uru. First, download and install uru. …
  2. Step 2: Install Ruby. …
  3. Step 3: ​Register your Ruby Installations with uru. …
  4. Step 4: Install Ruby Windows DevKit. …
  5. Step 5: Enjoy Hacking in Ruby.

How can I use an older version of Ruby?

To use any of the versions, simply type rvm <version> or rvm use <version> and to know which Ruby you are currently using type the command below. You should now see the Ruby version you chose previously.

How do I install a specific version of Ruby in Termux?

2 Answers

  1. Install gawk, curl and tar packages: apt install curl gawk tar.
  2. Go to rvm.io site and just copy ‘Install RVM’ command, look’ like: …
  3. Add this line [[ -s “$HOME/.rvm/scripts/rvm” ]] && . “$ …
  4. Now your shell must writing a syntax PS problem, just open rvm script and edit it:

How do I install a specific version of a gem?

Use `gem install -v`

You may already be familiar with gem install , but if you add the -v flag, you can specify the version of the gem to install. Using -v you can specify an exact version or use version comparators.

How do I manage multiple versions of ruby?

Using rbenv To Manage Multiple Ruby Versions

  1. Install. Upgrade or install ruby-build: …
  2. Add Ons. The plugin rbenv-bundler makes it possible to not have to type bundle exec in front of every command. …
  3. Check Local Versions. …
  4. Check Installable Versions. …
  5. Install A Ruby. …
  6. Use The Ruby.
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How do I change Ruby version in rails?

For each version you need to do these steps:

  1. Change the Rails version in the Gemfile.
  2. gem update.
  3. rails app:update.
  4. Apply all changes from the upgrade guide.
  5. Run your tests.
  6. Fix all failing tests.
  7. Fix all obsolete messages.

How do I use Ruby in Rbenv?

Get started with rbenv

  1. List the installed Ruby versions. To list the installed Ruby versions in your machine with rbenv, run the following command: rbenv version. …
  2. Install a Ruby version. To install a new Ruby version, use the rbenv install command: rbenv install VERSION. …
  3. Use a specific Ruby version for a project.

How do I switch between Ruby versions on a Mac?

Set Ruby version with rvm on Mac

0 on the command line. To switch to the system ruby, enter rvm use system . To switch back to the default, rvm default . The command rvm list will show all installed Rubies, including the current and default versions.

What is Ruby version file?

Many Ruby (or Rails) projects will include a simple .ruby-version file, which simply specifies a version number, for example: 2.4.2. Popular tools to help you manage your Ruby version are: Ruby Version Manager (RVM) rbenv.

How do I run a Ruby file in Terminal?

Running a Script

It’s easy — just create a file with the extension . rb , navigate to that file’s directory from the command line, and run it using $ ruby filename. rb (the dollar sign is just the command prompt). You’ll be able to gets from and puts to the command line now!

How do you check Ruby is installed or not?

Use ruby -v in command prompt. if it shows the version installed on the system. then it means Ruby is installed on your system.

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How do I see what version of Ruby is installed?

Check via the ruby –version command in terminal. Then let’s list all the Ruby packages available to install. This will display all the known Ruby versions. The list might be a little long for your terminal, so simply scroll to the top part where the #MRI Rubies are listed.