nodeTail.js error

(node) sys is deprecated. Use util instead.
(node) util.puts is deprecated. Use console.log instead.
nMy process PID: 12156n
Start tailing
events.js:154
      throw er; // Unhandled 'error' event
      ^

Error: spawn tail ENOENT
    at exports._errnoException (util.js:856:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:178:32)
    at onErrorNT (internal/child_process.js:344:16)
    at nextTickCallbackWith2Args (node.js:475:9)
    at process._tickCallback (node.js:389:17)
    at Function.Module.runMain (module.js:449:11)
    at startup (node.js:140:18)
    at node.js:1001:3