How do I change the default Ruby in Ubuntu?

How do I change Ruby version in Ubuntu?

To see what Ruby versions you have installed, run rvm ls . To switch between Ruby versions, run rvm use <version_number> (for example, rvm use 2.7. 1 ).

How do I change Ruby version in Linux?

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 set the default version of Ruby using RVM?

If you wish to switch back to your system ruby as default, remember that RVM does not “manage” the system ruby and is “hands off”. This means to set the “system” ruby as default, you reset RVM’s defaults as follows. Note that “default” is merely implemented as an alias with an especially significant name.

How do I check the default version of Ruby?

do an “rvm list” to see which Ruby versions you have installed.

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How do I switch from Ruby to Rbenv?

Basic GitHub Checkout

  1. Add ~/. rbenv/bin to your $PATH for access to the rbenv command-line utility. …
  2. Set up rbenv in your shell. …
  3. Restart your shell so that PATH changes take effect. …
  4. (Optional) Install ruby-build, which provides the rbenv install command that simplifies the process of installing new Ruby versions.

How do I downgrade Ruby Version?

As others have mentioned, its hard to come up with exact solution, in general to downgrade or switch versions for a user:

  1. Install Ruby 1.8.7 (or locate it on your system if you have it already)
  2. Edit your .bash_profile or .bashrc file to update your $PATH so that the 1.8.7 executable is found first. …
  3. 7/bin/ruby.


What is the latest version of Ruby?

5 is the current version, indicated by the symbol =>, and ruby-2.6. 3 is the default version, indicated by the symbol *. This output shows that the current version of Ruby is 2.5.

How do I install Ruby version?

Follow the steps given below for installing Ruby on Rails.

  1. Step 1: Check Ruby Version. First, check if you already have Ruby installed. …
  2. Step 2: Install Ruby. …
  3. Step 3: Install Rails. …
  4. Step 4: Check Rails Version. …
  5. Step 1: Install Prerequisite Dependencies. …
  6. Step 2: Install rbenv. …
  7. Step 3: Install Ruby. …
  8. Step 4: Install Rails.

How do I use a specific version of Ruby?

Selecting a version of Ruby

You’ll need to install bundler 1.2. x or above to use the ruby keyword and bundler 1.13. x or above to use a Ruby version specifier. You can use the ruby keyword in your app’s Gemfile to specify a specific version of Ruby.

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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 uninstall all versions of Ruby?

Any gems that you install while using an RVM’s ruby version, is self contained in that version. However there may come a time when you no longer want to use a particular ruby version and want to delete it along with all it’s gems. Then this can be done using the “remove” command.

How do I remove Ruby from RVM?

We will start with following simple command, this command will remove rvm/ directories and all rubies what you install with RVM. After above code, to remove full trace of the RVM, using below code. This will be remove RVM Gem.

uninstall ruby version manager – RVM

  1. bashrc.
  2. bash_profile.
  3. rvmrc.
  4. profile.
  5. zshrc.
  6. zlogin.

Which Ruby version should I use?

Well the very obvious answer would be use the latest and stable version of Ruby. Considering your requests and vision for Ruby, Rails that are being up-grading process suggest to go the latest version of Ruby.

How do I run a Ruby script?

Run a script

  1. Press Ctrl twice to invoke the Run Anything popup.
  2. Type the ruby script. rb command and press Enter . …
  3. (Optional) To run scratch files or scripts outside the project root, hold down the Alt key before running the command (in this case, the dialog title is changed to Run in Context ).
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