I was having the same issue when tried with the syntax "ng new " and solved that simply by updating the existing node version from 5.x.x to 8.x.x. After successful updation of node, the syntax worked perfectly for me. Please update the existing version of node. As it is clearly mentioned in angular documentation that these commands require the node version >= 6.9.x. For reference please check https://angular.io/guide/quickstart. It clearly states "Verify that you are running at least node 6.9.x and npm 3.x.x by running node -v and npm -v in a terminal/console window. Older versions produce errors, but newer versions are fine".

关闭CMD并再次以管理员权限打开或重新启动系统。

对我来说，它适用于:

npm run ng <command>

打开cmd，输入npm install -g @angular/cli 在环境变量中，在用户变量或系统变量中添加“Path”value=C:\Users\your-user\.npm-packages\node_modules\.bin 打开cmd: c:\>cd your-new-project-path .．.\project-path\> ng new my-app 或者ng all-ng-commands

在我的情况下，我做了以下步骤。

所有程序-> Node JS->右键单击Node. JS命令提示符，选择属性和从目标字符串在结束复制下面

/k "C:\Program Files\nodejs\nodevars.bat"

我启动Visual Studio Code并打开下面的文件

C:\Users\gochinta\AppData\Roaming\Code\User\settings.Json，并给出如下

// Place your settings in this file to overwrite the default settings
{
  "terminal.integrated.shellArgs.windows": 
  ["/k", "C:\\Program Files\\nodejs\\nodevars.bat"]

}

现在我在Visual Studio Code终端窗口中输入ng -v，它工作了。

这个方法几乎适用于我，但我必须使用:%USERPROFILE%\AppData\Roaming\npm ． 在环境变量中…/ /系统变量的路径

然后当我执行CMD: "ng -v"时，我得到了angular cli的正确响应。