Frequent question: Where do I specify Ruby version?

You also can specify a default version of Ruby in your home ~/. ruby-version file. Changing a Ruby version with chruby on the command line (for example chruby 3.0. 0 ) makes that version the default for future sessions.

How do I install a specific 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 manage Ruby version?

Basic command-line RVM usage can be boiled down to this set of commonly used commands:

  1. rvm install <version> installs given Ruby version on your system,
  2. rvm remove <version> removes given Ruby version from your system,
  3. rvm list lists all Ruby versions installed on your system,

How do I check Ruby version?

“how to check ruby version” Code Answer’s

  1. // Command line:
  2. $ ruby -v.
  3. // Within irb type “RUBY_VERSION”
  4. # => “2.4.1”
  5. // If using RVM:
  6. $ rvm current.
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What is a 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)

How do I specify a gem version?

There are several ways to specify gem versions:

  1. Use a specific version: gem “name-of-gem”, “1.0” . …
  2. Use a version operator: gem “name-of-gem”, “>1.0” . …
  3. Use that weird squiggly-stabby operator: gem “name-of-gem”, “~>1.3” . …
  4. Use a compound requirement: gem “name-of-gem”, “~>2.2”, “>=2.2.

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.

Can I have both RVM and Rbenv?

You can’t really have rbenv and rvm coexist. With rvm, it overrides the ‘gem’ command, so that would make rbenv useless. If you want to use rbenv for both, you’d have to avoid using gemsets and instead use bundler to handle dependencies.

How do I update my ruby version?

Ruby versions (updating)

  1. Upgrade ruby (using rvm) sudo rvm get head. …
  2. Install bundler. gem install bundler.
  3. Go to application root directory and install gems. cd APPLICATION_ROOT. …
  4. Install Easy Redmine. rake easyproject:install RAILS_ENV=production.
  5. You may also need to change the ruby version in a startup script.

How do I know if I have Ruby Rbenv?

For more information on rbenv, check the official GitHub repository.

  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. …
  3. Use a specific Ruby version for a project.
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Where is Ruby installed in MacOS?

MacOS comes with a “system Ruby” pre-installed. If you see /usr/bin/ruby , it is the pre-installed macOS system Ruby.

How do you set up Ruby?

Follow these steps:

  1. Open your Windows launch screen (or use the Start Menu).
  2. Click the Start Command Prompt with Ruby program. …
  3. Change your location to the Developer Kit folder. …
  4. Use Ruby to set up more Ruby tools. …
  5. Enter the install command and wait for it to complete:

What version of Ruby Do I have Windows?

Step 1: Check Ruby Version

Open the command prompt and type ruby -v. If Ruby responds, and if it shows a version number at or above 2.2. 2, then type gem –version.

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 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.

What is Rbenv and RVM?

Both rbenv and RVM are Ruby version management tools aka package managers. A package manager is a collection of software tools that automates the process of installing, upgrading, configuring, and removing computer programs from an OS in a consistent manner.