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Pro-Chance:~ rob-bee$ brew install node
Warning: node-7.9.0 already installed, it's just not linked.
Pro-Chance:~ rob-bee$ brew link node
Linking /usr/local/Cellar/node/7.9.0...
Error: Could not symlink bin/node
Target /usr/local/bin/node
already exists. You may want to remove it:
  rm '/usr/local/bin/node'

To force the link and overwrite all conflicting files:
  brew link --overwrite node

To list all files that would be deleted:
  brew link --overwrite --dry-run node
Pro-Chance:~ rob-bee$