$  which node

/opt/node/bin/node

$ ls -l `which node`

lrwxrwxrwx 1 pi root 26 Jan 18 01:57 /opt/node -> node-v0.10.28-linux-arm-pi

sudo ln -s /usr/local/bin/node /usr/bin/node
sudo ln -s /opt/node/lib/node /usr/lib/node
sudo ln -s /opt/node/bin/npm /usr/bin/npm
sudo ln -s /opt/node/bin/node-gyp /usr/bin/node-gyp

$  which node

/usr/bin/node

$ ls -l `which node`

lrwxrwxrwx 1 root root 18 Mar 1 01:47 /usr/bin/node -> /opt/node/bin/node