我怎么知道 Angular 7.1.4 安装正确？

Question

我在我的 gcp ubuntu 服务器上安装了 angular 7.1.4，这是我在使用命令后得到的

ng version


Angular CLI: 7.1.4
Node: 8.16.2
OS: linux x64
Angular: 7.1.4
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.11.4
@angular-devkit/build-angular     0.11.4
@angular-devkit/build-optimizer   0.11.4
@angular-devkit/build-webpack     0.11.4
@angular-devkit/core              7.1.4
@angular-devkit/schematics        7.1.4
@ngtools/webpack                  7.1.4
@schematics/angular               7.1.4
@schematics/update                0.11.4
rxjs                              6.3.3
typescript                        3.1.6
webpack                           4.23.1

还有

node -v
v8.16.2

我还使用命令创建了一个项目

ng new angular-demo

root@la-test-angular-node:/angular-demo# ng serve


** Angular Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **

Date: 2019-12-02T13:06:43.122Z
Hash: bb8b52ddfa46c6b4d208
Time: 20085ms
chunk {main} main.js, main.js.map (main) 11.5 kB [initial] [rendered]
chunk {polyfills} polyfills.js, polyfills.js.map (polyfills) 237 kB [initial] [rendered]
chunk {runtime} runtime.js, runtime.js.map (runtime) 6.08 kB [entry] [rendered]
chunk {styles} styles.js, styles.js.map (styles) 16.3 kB [initial] [rendered]
chunk {vendor} vendor.js, vendor.js.map (vendor) 3.67 MB [initial] [rendered]
ℹ ｢wdm｣: Compiled successfully.

但它没有在网络浏览器中打开我收到此站点无法访问错误，我也尝试过

ng serve --host:ip-address 

但仍然遇到同样的错误，请帮我看看我做错了什么？ 我不知道它的角度问题或节点，但我没有得到默认的角度页面。

谢谢。

更新我按照建议使用了这个命令，我没有添加任何代码我只是想打开默认的角度页面。

ng serve -o --host=10.37.0.5

得到这个

** Angular Live Development Server is listening on 10.37.0.5:4200, open your browser on http://10.37.0.5:4200/ **

Date: 2019-12-02T13:29:53.559Z
Hash: bb8b52ddfa46c6b4d208
Time: 45913ms
chunk {main} main.js, main.js.map (main) 11.5 kB [initial] [rendered]
chunk {polyfills} polyfills.js, polyfills.js.map (polyfills) 237 kB [initial] [rendered]
chunk {runtime} runtime.js, runtime.js.map (runtime) 6.08 kB [entry] [rendered]
chunk {styles} styles.js, styles.js.map (styles) 16.3 kB [initial] [rendered]
chunk {vendor} vendor.js, vendor.js.map (vendor) 3.67 MB [initial] [rendered]
ℹ ｢wdm｣: Compiled successfully.
(node:1956) UnhandledPromiseRejectionWarning: Error: Exited with code 3
    at ChildProcess.cp.once.code (/angular-demo/node_modules/opn/index.js:84:13)
    at Object.onceWrapper (events.js:317:30)
    at emitTwo (events.js:126:13)
    at ChildProcess.emit (events.js:214:7)
    at maybeClose (internal/child_process.js:915:16)
    at Socket.stream.socket.on (internal/child_process.js:336:11)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    at Pipe._handle.close [as _onclose] (net.js:561:12)
(node:1956) 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:1956) [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.

Answer 1

试试 ng serve -o

（-o 用于强制打开网络浏览器，不过会在默认的 4200 端口打开）

Answer 2

端口 4200 可能正在使用中。您可以通过以下方式尝试其他端口：

ng serve --port 6787

Answer 3

好的，所以我尝试了不同的方法，是的，正确的方法是使用此命令

ng serve --host 0.0.0.0

0.0.0.0 为其他人打开主机，这意味着我们可以在任何服务器上使用端口 4200，但是在我打开 4200 端口时，由于 gcp 的防火墙，它无法正常工作，然后它开始工作。