RVM gem permissions error
linux, ruby, ruby-on-rails, rvm
Solution
You missed to use ruby, you can do it with:
rvm use 1.9.3 --install
In case 1.9.3 was not installed, this command will also install it!
It also looks you are using Ubuntu, make sure you are not using RVM from Ubuntu package - that thing is broken! You can find instruction how to fix it here: https://stackoverflow.com/a/9056395/497756
Problem
I started trying to set up a local rails installation for development. After I installed in using `apt-get`, however, I learned about RVM, so I removed the earlier one, and reinstalled from RVM. It looks like I have residual problems, though. Specifically, when I try to install rails I get... ``` $ gem install rails ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions into the /var/lib/gems/1.9.1 directory. ``` This already looks like a problem, because I don't want it to be in the /var/ directory, I want it to be in the user directory. So, I check the following... ``` $ gem env RubyGems Environment: - RUBYGEMS VERSION: 1.8.11 - RUBY VERSION: 1.9.3 (2011-10-30 patchlevel 0) [x86_64-linux] - INSTALLATION DIRECTORY: /var/lib/gems/1.9.1 - RUBY EXECUTABLE: /usr/bin/ruby1.9.1 - EXECUTABLE DIRECTORY: /usr/local/bin - RUBYGEMS PLATFORMS: - ruby - x86_64-linux - GEM PATHS: - /var/lib/gems/1.9.1 - /home/myusername/.gem/ruby/1.9.1 - GEM CONFIGURATION: - :update_sources => true - :verbose => true - :benchmark => false - :backtrace => false - :bulk_threshold => 1000 - REMOTE SOURCES: - http://rubygems.org/ ``` As well as sudo'd: ``` $ sudo gem env RubyGems Environment: - RUBYGEMS VERSION: 1.8.11 - RUBY VERSION: 1.9.3 (2011-10-30 patchlevel 0) [x86_64-linux] - INSTALLATION DIRECTORY: /var/lib/gems/1.9.1 - RUBY EXECUTABLE: /usr/bin/ruby1.9.1 - EXECUTABLE DIRECTORY: /usr/local/bin - RUBYGEMS PLATFORMS: - ruby - x86_64-linux - GEM PATHS: - /var/lib/gems/1.9.1 - /home/myusername/.gem/ruby/1.9.1 - GEM CONFIGURATION: - :update_sources => true - :verbose => true - :benchmark => false - :backtrace => false - :bulk_threshold => 1000 - REMOTE SOURCES: - http://rubygems.org/ ``` gems seem to live in /var/lib for some reason. Is this normal? How can I fix this so I can install the rails gem? EDIT: UPDATE! It appears to me that I have gems installed twice, once in /var/lib/gems/1.9.91 (bad) and once in /home/myusername/.gem/ruby/1.9.1 (good). I think what is happening here is that when I type "gem" the installation in /var/lib/gems/1.9.1 (bad) is taking priority over /home/myusername/.gem/ruby/1.9.1 (good). Can anyone confirm that? Also, would it be OK and fix things just to delete the bad directory, or would that cause problems?