No sudo install of n & iojs with NPM

n.sh

#!/bin/bash    

# prerequisites,  the terminal should be able to "Run command as login shell", see profile/title & commands
# Create .local/bin 
 
    mkdir -p ~/.local/bin
 
# Add local/bin to path & add environment variable N_PREFIX
 
    printf '\nexport PATH=$PATH:$HOME/.local/bin' >> $HOME/.bash_profile
 
    printf '\nexport N_PREFIX=$HOME/.local' >> $HOME/.bash_profile
 
# Download n
 
    git clone https://github.com/visionmedia/n
 
# Install n to ~/.local
 
    PREFIX=$HOME/.local make install -C n
 
# Reload .bash_profile
 
    source ~/.bash_profile
 
# Delete n download
 
    rm -rf n
 
# You should now be ready to install node stable after realoading all terminals.
# $ n stable or "$ n io stable", for io flavoured node

how we get sudoo and node