Using rbenv doesn't work with sudo?

Question

Any commands that use sudo don\'t seem to work with RBenv.

I\'m trying to install ActiveRecord and it says I don\'t have write permission, so when I try

Answer 1

My answer in "Installing Ruby 2.0 and Rails 4.0.0beta on AWS EC2" might be useful to you.

In short, the root user needs to have rbenv loaded in its environment for you to use the gems installed by rbenv. This can be done by adding the following

# /etc/profile.d/rbenv.sh
export RBENV_ROOT=/usr/local/rbenv
export PATH="${RBENV_ROOT}/bin:$PATH"
eval "$(rbenv init -)"

This should be sufficient for sudo to work. If you are writing a shell script, you might need to use

. /etc/profile.d/rbenv.sh 

before using executables from other gems.