Auto download and install node based on specified version. Tested on Ubuntu 12 x64

update-node.sh

if [ "$1" == "" ]; then
	echo "You need to specify version like 0.10.0.15"
	exit
fi

nodev="node-v$1-linux-x64"
package="$nodev.tar.gz"

echo "Downloading to $1"
wget "http://nodejs.org/dist/v$1/node-v$1-linux-x64.tar.gz"

if [ -f "$package" ]; then
	echo "Downloaded"
else
	echo "Bad version?"
	exit
fi

echo "Unpacking..";
tar -xf $package

echo "Moving into place..";
mkdir -p /usr/local/bin
cp "./$nodev/bin/node" /usr/local/bin/node
cp "./$nodev/bin/npm" /usr/local/bin/npm
mkdir -p /usr/local/lib/node_modules
cp -R ./"$nodev/lib/node_modules/npm" /usr/local/lib/node_modules/npm
chown -R nobody:root /usr/local/lib/node_modules/npm

echo "Cleaning up..."
rm -rf "./$nodev"
rm $package

Usage

./update-node.sh 0.10.15

Auto selects linux 64bit because I'm always using ubuntu 64bit. Zero error checking, super-fast when it all goes right. Already had a version of node installed so this probably won't work fresh without making /usr/local/lib/node_modules first.