Изменить корень узела.
$which node
/usr/local/bin/node
$sudo su
$which node
/usr/bin/node
$export PATH=$PATH:/usr/local/bin
$node -v
v7.2.0
Amir .R
$which node
/usr/local/bin/node
$sudo su
$which node
/usr/bin/node
$export PATH=$PATH:/usr/local/bin
$node -v
v7.2.0