windows没问题 ubuntu npm run dev如下：

[qiyebeike]

(node:9250) UnhandledPromiseRejectionWarning: Error: Exited with code 3
at ChildProcess. (/home/demoadmin/vue-admin-master/node_modules/opn/index.js:83:13)
at Object.onceWrapper (events.js:285:13)
at ChildProcess.emit (events.js:197:13)
at maybeClose (internal/child_process.js:984:16)
at Socket.stream.socket.on (internal/child_process.js:401:11)
at Socket.emit (events.js:197:13)
at Pipe._handle.close (net.js:611:12)
(node:9250) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:9250) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.