Cannot use RVM-installed Ruby with sudo
RubyRvmSudoRuby Problem Overview
I have succefully configured RVM to use Ruby 1.9.2 and everything is fine. However when I'm trying to run Ruby using sudo it says it cannot find RVM or Ruby:
$ ruby -v
ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-linux]
$ sudo ruby -v
[sudo] password for administrator:
sudo: ruby: command not found
Is that correct behavior or is my RVM misconfigured? Perhaps I should be using the system wide install?
Ruby Solutions
Solution 1 - Ruby
Use rvmsudo command instead of sudo
Solution 2 - Ruby
Taking @calas' answer one step further, add this to your ~/.bashrc:
alias sudo=rvmsudo
This avoids the requirement of having to remember to change sudo to rvmsudo for every command (particularly annoying for copy/pasted commands).
Solution 3 - Ruby
Sudo is resetting your PATH. rvm works by modifying your PATH environment variable so that the ruby you're using is a particular one, probably in your ~/.rvm/rubies directory. When you ruby ruby with sudo, sudo is not using that modified PATH, and so it will not find your rvm ruby. See this question for workarounds: https://stackoverflow.com/questions/257616/sudo-changes-path-why
Solution 4 - Ruby
@calas's answer is the answer. but If you can't achieve your goal by using rvmsudo, e.g. install the nginx using the command passenger-install-nginx-module, please just change the owner of the related folder/path. e.g.
$ chown <your_username>:<your_group> /opt -R
$ passenger-install-nginx-module