What is Rbenv rehash?

rbenv rehash Installs shims for all Ruby executables known to rbenv (i.e., ~/. Run this command after you install a new version of Ruby, or install a gem that provides commands.

What is Rbenv?

rbenv is a tool that lets you install and run multiple versions of Ruby side-by-side. It’s a simple, lightweight alternative to RVM that focuses solely on managing multiple Ruby environments. Each version of Ruby is installed in the ~/. rbenv/versions directory.

What is Rbenv and RVM?

RVM overrides the cd shell command in order to load the current Ruby environment variables. Not only can the override cause unexpected behavior, but it also means that rubies and gemsets are loaded when switching directories. rbenv does things on the fly by using shims to execute commands.

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.

Is Rbenv installed?

Rbenv is installed if necessary. The user to run rbenv as. New in version 0.17. 0.

How do I start 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.

Which is better Rbenv or RVM?

RVM is more resourceful but rbenv is lightweight which makes it a strong contender for RVM. RVM is used to manage and install different versions of Ruby and gemsets on system where Rbenv is a lightweight Ruby version management tool. Compared to RVM, rbenv does not manage gemsets nor install different Ruby versions.

Can I use 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.

What is Ruby used for?

Ruby is most used for building web applications. However, it is a general-purpose language similar to Python, so it has many other applications like data analysis, prototyping, and proof of concepts. Probably the most obvious implementation of Ruby is Rails web, the development framework built with Ruby.

How do I install Rbenv on Windows?


  1. Config path. Add the bin & shims directory to your PATH environment variable for access to the rbenv command.
  2. Restart your shell. > exit.
  3. Run the following command after rbenv installation , to enable the ruby . > rbenv install 2.2.4 > rbenv global 2.2.4 > rbenv rehash.

What is bundler gem?

Bundler provides a consistent environment for Ruby projects by tracking and installing the exact gems and versions that are needed. Bundler is an exit from dependency hell, and ensures that the gems you need are present in development, staging, and production. Starting work on a project is as simple as bundle install .

How to check that RBenv is properly set up?

(Opening a new terminal tab will usually do it.) Verify that rbenv is properly set up using this rbenv-doctor script:

How does RBenv work to match Ruby commands?

Through a process called rehashing, rbenv maintains shims in that directory to match every Ruby command across every installed version of Ruby—irb, gem, rake, rails, ruby, and so on. Shims are lightweight executables that simply pass your command along to rbenv.

How to set up RBenv in Ubuntu command line?

Add ~/.rbenv/bin to your $PATH for access to the rbenv command-line utility. In Ubuntu ~/.bash_profile is only sourced by bash when started in interactive login mode. That is typically only when you login at the console (Ctrl+Alt+F1..F6), or connecting via ssh. This issue is explained in detail here. Set up rbenv in your shell.

How to remove and uninstall RBenv from Ruby?

To completely uninstall rbenv, perform step (1) and then remove its root directory. This will delete all Ruby versions that were installed under `rbenv root`/versions/ directory: rm -rf `rbenv root` If you’ve installed rbenv using a package manager, as a final step perform the rbenv package removal. For instance, for Homebrew: brew uninstall rbenv