System wide install rbenv on Debian

install-rbenv-user.sh

#!/bin/bash

# per-user install
echo 'if [ -z "$(type rbenv 2> /dev/null | head -1 | grep function)" ]; then' >> ~/.bashrc
echo '    export RBENV_ROOT=/usr/local/rbenv' >> ~/.bashrc
echo '    export PATH=$RBENV_ROOT/bin:$PATH' >> ~/.bashrc
echo '    eval "$(rbenv init -)"' >> ~/.bashrc
echo 'fi' >> ~/.bashrc

install-rbenv.sh

#!/bin/bash

apt-get -y install build-essential git-core zlib1g-dev libssl-dev libreadline6-dev

git clone git://github.com/sstephenson/rbenv.git /usr/local/rbenv


# system wide install
echo 'export RBENV_ROOT=/usr/local/rbenv' > /etc/profile.d/rbenv.sh
echo 'export PATH=$RBENV_ROOT/bin:$PATH' >> /etc/profile.d/rbenv.sh
echo 'eval "$(rbenv init -)"' >> /etc/profile.d/rbenv.sh
ln -s /usr/local/rbenv/completions/rbenv.bash /etc/bash_completion.d/rbenv

source /etc/profile.d/rbenv.sh

git clone git://github.com/sstephenson/ruby-build.git /tmp/ruby-build
cd /tmp/ruby-build
PREFIX=/usr/local/rbenv ./install.sh
cd ..
rm -rf /tmp/ruby-build

Thanks a lot :)