rbenv not changing ruby version

Question

I installed rbenv according to the github directions  I am running OSX but I have tried this on a Ubuntu 12 04 VM and got the same results  The following is what i get in my terminal when I try to change ruby versions   rbenv versions   1 9 3-p0  set by  Users user  rbenv version  1 9 3-p125  rbenv global 1 9 3-p0  rbenv rehash  ruby -v ruby 1 8 7  2011-12-28 patchlevel 357   universal-darwin11 0   which ruby  usr bin ruby   Anyone have any ideas as to why rbenv isn t switching the ruby version like it thinks it is  Also there is no  rbenv file in the local directory that would be causing the ruby version to default to 1 8 7  rbenv local rbenv  no local version configured for this directory

User · Answer

The accepted answer suggests to add the following:

export PATH="$HOME/.rbenv/bin:$PATH"

This will not work on Mac OSX, which the OP references. In fact, if you install rbenv via brew install rbenv, which is really the only installation method in Mac OSX, since curl -fsSL https://github.com/rbenv/rbenv-installer/raw/master/bin/rbenv-installer | bash will FAIL in OSX, then the rbenv executable will be installed in:

$ which rbenv
/usr/local/bin/rbenv

However, even in OSX, the rbenv root will remain in the $HOME directory:

~ viggy$ rbenv root
/Users/viggy/.rbenv

What does this mean? It means when you install rubies, they will install in the given home directory under .rbenv:

$ rbenv install 2.6.0
$ ls ~/.rbenv/versions
2.6.0

Now the brew installation did some work that you would have to perform manually in Linux. For example, in Linux, you would have to install ruby-build manually as a plugin:

$ mkdir -p "$(rvbenv root)/plugins"
$ git clone https://github.com/rbenv/ruby-build.git "(rbenv root)"/plugins/ruby-build

This is already done with the homebrew installation. There is one important step that must be done in the homebrew installation, as in the Linux installation. You must add the rbenv shims to your path. In order to do that, when your shell starts, you have to evaluate the following command (which will in turn add the rbenv shims to the beginning of your $PATH):

$ vim ~/.bash_profile
eval "$(rbenv init -)"
$ source ~/.bash_profile

Now when you run echo $PATH, you will see the rbenv shims:

$ echo $PATH
/Users/viggy/.rbenv/shims:

Now check your ruby version and it will reflect the rbenv ruby installed:

ruby -v
ruby 2.6.0p0

User · Answer

First step is to find out which ruby is being called    which ruby  Your system says   usr bin ruby  This is NOT the shim used by rbenv  which  on MacOS  should look like   Users  lt username gt   rbenv shims ruby  The shim is actually a script that acts like a redirect to the version of ruby you set  I recommend that for trouble shooting you unset the project specific  quot local quot  version  and the shell specific  quot shell quot  version and just test using the  quot global quot  version setting which is determined in a plain text file in    rbenv version which will just be the version number  quot 1 9 3 quot  in your case    rbenv global 1 9 3   rbenv local --unset   rbenv shell --unset  You can do ls -laG in the root of your project folder  not the home folder  to make sure there is no longer a  quot  ruby-version quot  file there  You can use rbenv versions to identify which version rbenv is set to use  and the location and name of the file that is setting that     rbenv versions  NONE OF THAT MATTERS until you set the path correctly  Use this to make sure your  MacOS will obey you    rbenv init -  Followed by    which ruby  To make sure it looks like   Users  lt username gt   rbenv shims ruby  Then run this to add the line to your profile so it runs each time you open a new terminal window    echo  eval  quot   rbenv init -  quot    gt  gt     bash profile  There are other ways to modify the path  feel free to substitute any of them instead of running the rbenv init  NOTE  reinstall Rails with    gem install rails  If you were trying to run Ruby on Rails  then you need to have this all working first  then install the rails gem again   A previous install of Rails will use a hard coded path to the wrong ruby and several other things will be in the wrong place  so just install the gem again  P  S  If your MacOS won t obey you   mentioned above  then you may have to find another way to modify your path  but that s unlikely to be a problem because  quot Macs just work quot

User · Answer

I forgot to delete rvm before installing rbenv  I deleted rvm and re-installed rbenv  but system still wasn t using the version of Ruby being designated as global by rbenv  I tried shutting Terminal  but it only worked once I restarted the whole machine

User · Answer

Run this command  Add rbenv to bash so that it loads every time you open a terminal  echo  if which rbenv  gt   dev null  then eval    rbenv init -    fi   gt  gt     bash profile source    bash profile   this will solve your problem Reference

User · Answer

Make sure the last line of your  bash profile is   export PATH   HOME  rbenv bin  PATH  eval    rbenv init -

User · Answer

All the other answers here give good advice for various situations  but there is an easier way  The rbenv docs point us to the rbenv-doctor diagnostic tool that will quickly verify all these potential pitfalls on your system  curl -fsSL https   github com rbenv rbenv-installer raw master bin rbenv-doctor   bash  When all is well  you ll see this    curl -fsSL https   github com rbenv rbenv-installer raw master bin rbenv-doctor   bash                                      lt aws hd-pmp-developer gt  Checking for  rbenv  in PATH   usr local bin rbenv Checking for rbenv shims in PATH  OK Checking  rbenv install  support   usr local bin rbenv-install  ruby-build 20201005  Counting installed Ruby versions  1 versions Checking RubyGems settings  OK Auditing installed plugins  OK  Now  if we break one of those expectations  e g  remove rbenv-install   the tool will point us directly to the problem  with a link to how to fix it    mv  usr local bin rbenv-install rbenv-install-GONE                                                                          curl -fsSL https   github com rbenv rbenv-installer raw master bin rbenv-doctor   bash                                      Checking for  rbenv  in PATH   usr local bin rbenv Checking for rbenv shims in PATH  OK      gt  Checking  rbenv install  support  not found  lt       Unless you plan to add Ruby versions manually  you should install ruby-build    Please refer to https   github com rbenv ruby-build installation  Counting installed Ruby versions  1 versions Checking RubyGems settings  OK Auditing installed plugins  OK

User · Answer

If you are using bash  go to     bash profile   and add the following line  if it s not already there   if which rbenv  gt   dev null  then eval    rbenv init -    fi   If you are using Zsh  go to     zshrc   and add the same line of code  at the end of the  zshrc file   Then simply restart your terminal and it should be fine now

User · Answer

for fish shell user  set --universal fish user paths  fish user paths    rbenv shims

User · Answer

I just found this same problem  What I did was uninstall rbenv  via homebrew  and reinstall it  I also added   if which rbenv  gt   dev null  then eval    rbenv init -    fi   into    bash profile when I reinstalled rbenv  Works perfectly now

User · Answer

Strangely  rbenv version did not set the  rbenv file  Check with  ls -ltra -- gt  to see that a rbenv was written

User · Answer

As for me the easiest way to use rbenv along with zsh is adding rbenv to plugins section in  zshrc config  In my case it looks similar to     Which plugins would you like to load   plugins can be found in    oh-my-zsh plugins      Custom plugins may be added to    oh-my-zsh custom plugins    Example format  plugins  rails git textmate ruby lighthouse    Add wisely  as too many plugins slow down shell startup  plugins  git bower rails ruby rbenv gulp npm node nvm sublime    After that there re no problems when installing  switching  using ruby versions with help of rbenv   Mind to restart your terminal session after made changes

User · Answer

Linux   Ubuntu Users Step 1    rbenv versions   system   2 6 0   2 7 0  set by  home User Documents sample-app  ruby-version   Yours will be different   2 7 2   Step 2    nano  home User Documents sample-app  ruby-version  Step 3    ruby -v ruby 2 7 2p137  2020-10-01 revision 5445e04352   x86 64-linux

User · Answer

Check that PATH contains  HOME  rbenv shims and  HOME  rbenv bin   env   grep PATH  Also check that you have the following in your    bash profile if using bash or    zshenv if using zsh export PATH  quot  HOME  rbenv bin  PATH quot  eval  quot   rbenv init -  quot   NOTE  Make sure it s the last setting in your    bash profile   I ran into an issue where I installed a program that updated my  bash profile and reset PATH  Finally  make sure your  HOME folder doesn t have a  ruby-version file that you may have created by accident if you were to have done   rbenv local  lt ruby-version gt  in your  HOME folder  Doing   rbenv global  lt ruby-version gt  modifies the  HOME  rbenv version file  and the existence of a  ruby-version file in the  HOME folder would override the version set by  HOME  rbenv version  From the docs   Choosing the Ruby Version When you execute a shim  rbenv determines which Ruby version to use by reading it from the following sources  in this order    The RBENV VERSION environment variable  if specified  You can use the rbenv shell command to set this environment variable in your current shell session    The first  ruby-version file found by searching the directory of the script you are executing and each of its parent directories until reaching the root of your filesystem    The first  ruby-version file found by searching the current working directory and each of its parent directories until reaching the root of your filesystem  You can modify the  ruby-version file in the current working directory with the rbenv local command    The global    rbenv version file  You can modify this file using the rbenv global command  If the global version file is not present  rbenv assumes you want to use the  quot system quot  Ruby   i e  whatever version would be run if rbenv weren t in your path

User · Answer

There a lot of of misleading answers that work  I thought it was worth mentioning the steps from the rbenv README     brew install rbenv   rbenv init and follow the instructions it gives you  This is what I got       rbenv init   Load rbenv automatically by appending   the following to    bash profile   eval  quot   rbenv init -  quot   I updated my    bash profile     Close terminal and open it again Verify it s working correctly by running     curl -fsSL https   github com rbenv rbenv-installer raw master bin rbenv-doctor   bash   Now just install the version you want by doing  rbenv install  lt version gt

User · Answer

I came to the same problem  Fixed this by run the rbenv global command with sudo  I think it was something permission problem  update  I finally found the solution  There was one same file  quot version quot  on my mac   which is under  usr local Cellar rbenv 0 3 0   I think it was created by mistake occasionally  you should remove it

User · Answer

You could try using chruby  chruby does not rely on shims  instead it only modifies PATH  GEM HOME  GEM PATH

User · Answer

When I had these symptoms  the problem turned out to be that install had failed halfway through for the new Ruby version I was trying to switch to  without me noticing  The fix was to delete  amp  reinstall it    This meant that even though ruby 1 9 3 showed up in the rbenv list of available versions  it didn t have an executable on the path where rbenv assumed it would  Since rbenv tries to change your ruby version just by prepending a location to your path  if there s nothing actually in the location it prepends  your OS will happily continue searching your default path and find your system version  in my case like the question s 1 8 7

User · Answer

I fixed this by adding the following to my    bash profile   PATH for rbenv export PATH  quot  HOME  rbenv shims  PATH quot   This is what is documented at https   github com sstephenson rbenv  From what I can tell there isn t    rbenv bin directory  which was mentioned in the post by  rodowi

User · Answer

run   rbenv init   After I ran that  when i set my local rbenv version   rbenv local 2 4 0   then my ruby -v and my rbenv local versions coincided   Note  You might also want to exit the directory you re in and then go back into it  i ve noticed that was necessary for me in order to get things to work

User · Answer

This may be an old question  but Google led me here and  for posterity sake  thought I d share   My problem persisted after many of the recommended solutions above  Like the OP  I installed rbenv and then a ruby version  but my laptop defaulted to system  What I had overlooked was that when I ran       rbenv    rbenv versions   system  set by  Users alphadogg  rbenv version    2 0 0-p247   IOW  it was still defaulting to system  A quick      rbenv    rbenv local 2 0 0-p247   switched it to the new version

User · Answer

rbenv help shell   Sets a shell-specific Ruby version by setting the  RBENV VERSION  environment variable in your shell  This version overrides localapplication-specific versions and the global version  should be a string matching a Ruby version known to rbenv The special version string  system  will use your default system Ruby  Run rbenv versions  for a list of available Ruby versions    Provided rbenv was installed correctly  ruby -v will correspond to   rbenv shell 1 9 3-p125

User · Answer

I had the same problem  but caused by Homebrew        rbenv version 2 3 0  set by  Users user  rbenv version       ruby -v ruby 2 3 3p222  2016-11-21 revision 56859   x86 64-darwin16       which ruby  usr local bin ruby   Somehow I had installed Ruby via Homebrew too  and the Homebrew path was ahead of the rbenv path in my  PATH  Running brew uninstall ruby fixed it for me

User · Answer

This happened to me right after I reinstalled rbenv  Apparently I had a  ruby-version file in my home directory  specifying a version that no longer existed  Once I deleted the file  everything worked

User · Answer

In my case changing the    zshenv did not work  I had to make the changes inside    zshrc   I just added      Include rbenv for ZSH export PATH   HOME  rbenv bin  PATH  eval    rbenv init -     at the top of    zshrc  restarted the shell and logged out   Check if it worked        rbenv install 2 4 0      rbenv global 2 4 0      rbenv global 2 4 0      ruby -v ruby 2 4 0p0  2016-12-24 revision 57164   x86 64-darwin16

[ruby] rbenv not changing ruby version

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