Install iojs.md

Install first for ubuntu:

sudo apt-get install build-essential libssl-dev curl git-core

Compile the required iojs version and put in global reach:

# install iojs from Github (replace 1.3.0 with required version)
git clone https://github.com/iojs/io.js.git iojs
cd iojs
git checkout v1.3.0
./configure --prefix=/usr/local/iojs1.3.0
make
sudo make install
cd ..

Add nodejs.sh script to /etc/profile.d

# set PATH so it includes iojs bin
export PATH="/usr/local/node/bin:/usr/local/iojs/bin":"${PATH}"

Link /usr/local/node to correct version:

sudo ln -s /usr/local/iojs1.3.0 /usr/local/node
sudo ln -s /usr/local/iojs1.3.0 /usr/local/iojs

Adding/changing /etc/sudoers.d/secure_path:

Defaults  secure_path=/usr/local/node/bin:/usr/local/iojs/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/X11R6/bin

(BTW users capable to use sudo need to have the sudo group in their group list!!)