get mac address error: Error: Command failed: /bin/sh: ifconfig: command not found
at ChildProcess.exithandler (child_process.js:540:15)
at ChildProcess.EventEmitter.emit (events.js:99:17)
at maybeClose (child_process.js:638:16)
at Socket.ChildProcess.spawn.stdin (child_process.js:815:11)
at Socket.EventEmitter.emit (events.js:96:17)
at Socket._destroy.destroyed (net.js:357:10)
at process.startup.processNextTick.process._tickCallback (node.js:244:9)
get mac address: undefined