How do I know what version of ruby I have installed?

How do I know what version of ruby I have installed?

If using macOS, you probably already have Ruby 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.

How do I change Ruby version using RVM?

Ruby versioning with Ruby Version Manager (RVM)

1. Install rvm.
2. Install another Ruby version using RVM by running: rvm install 2.4.2.
3. You can now list the versions of Ruby that are installed by the command below: rvm list.

How do I know if I have ruby Rbenv?

You can see if it is using rbenv by typing which ruby and it should print something out with . rbenv/ whatever. If not you need to set rbenv as your current ruby. You can do that like rbenv global 2.1.

How do I check my version of ruby on Rails?

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. If you don’t get an error, skip Install Ruby step.

How do I switch between rails versions?

In Windows: open that “rails” file with text editor you will see —– version = “>= 0” (which means: it opens the highest version of rails, which exist in your ruby gems)

What is the latest version of Ruby?

3.0.2
The current stable version is 3.0. 2. Please be sure to read Ruby’s License.

How do I run a ruby file?

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).

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.

How do I run a Ruby file?

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.

What is RVM Gemset?

RVM gives you compartmentalized independent ruby setups. This means that ruby, gems and irb are all separate and self-contained – from the system, and from each other. You may even have separate named gemsets.

Which is the latest version of RVM for Ruby?

For example, if you only have 2.0.0-p451 installed, and 2.0.0-p481 is the latest, RVM will attempt to download, install, and set 2.0.0-p481 as your default 2.0.0 for you. This behaviour may, or may not, be what you want. If its not, then be sure to include the patch level when you specify which Ruby RVM should use when setting a default.

What does hidden mean in Ruby Version Manager?

Hidden does not mean RVM is gone, instead, what is done is the system environment and related variables are set back to what the system Ruby would expect them to be as if RVM were not installed at all. Executing another $ rvm use default will return RVM to service, and load whatever Ruby you have set as your default Ruby.

Do you want to know which Ruby Version I am using?

Do you want to know where your ruby binary is installed? It can also sometimes reveal the version you are using as it is usually part of directory structure. Just run which ruby. If you want to know even more about your current ruby setup, there is a command for that as well!

How often does RVM update the known list?

If its not, then be sure to include the patch level when you specify which Ruby RVM should use when setting a default. RVM updates the known list ($rvm_path/config/db and $rvm_path/config/known) every time you update RVM, so the ‘current’ version of a Major.Minor (e.g. 2.1.2 at the time of writing) can change on you.