npm ERR! code ENOTFOUND npm ERR! syscall getaddrinfo npm ERR! errno ENOTFOUND npm ERR! network request to https://registry.npm.taobao.org/@vue%2fcli failed, reason: getaddrinfo ENOTFOUND proxy-server npm ERR! network This is a problem related to network connectivity. npm ERR! network In most cases you are behind a proxy or have bad network settings. npm ERR! network npm ERR! network If you are behind a proxy, please make sure that the npm ERR! network 'proxy' config is set properly. See: 'npm help config' npm ERR! Log files were not written due to an error writing to the directory: E:\Program Files\node.js\node_cache\_logs npm ERR! You can rerun the command with `--loglevel=verbose` to see the logs in your terminal C:\Users\lhq>npm config set registry http://registry.cnpmjs.org/ C:\Users\lhq>npm install -g @vue/cli npm ERR! code ENOTFOUND npm ERR! syscall getaddrinfo npm ERR! errno ENOTFOUND npm ERR! network request to http://registry.cnpmjs.org/@vue%2fcli failed, reason: getaddrinfo ENOTFOUND proxy-server npm ERR! network This is a problem related to network connectivity. npm ERR! network In most cases you are behind a proxy or have bad network settings. npm ERR! network npm ERR! network If you are behind a proxy, please make sure that the npm ERR! network 'proxy' config is set properly. See: 'npm help config' npm ERR! Log files were not written due to an error writing to the directory: E:\Program Files\node.js\node_cache\_logs npm ERR! You can rerun the command with `--loglevel=verbose` to see the logs in your terminal

这个错误提示表明你的网络连接存在问题，可能是由于代理设置不正确或网络设置不正确导致的。你可以尝试以下解决方案：

1. 检查代理设置：如果你使用了代理服务器，请确保代理配置正确。可以使用以下命令检查代理配置：

   npm config get proxy
   npm config get https-proxy

如果返回结果为空或不正确，可以使用以下命令进行设置：

   npm config set proxy http://your-proxy-server:port
   npm config set https-proxy http://your-proxy-server:port

将 `your-proxy-server` 替换为你的代理服务器地址，`port` 替换为代理服务器的端口号。

2. 检查网络设置：确保你的网络连接正常，并且没有任何网络层面的问题。可以尝试打开其他网页或使用其他网络连接检查。

3. 更换注册表源：你可以尝试切换到其他的 npm 注册表源。在命令行中运行以下命令切换到 cnpmjs 的源：

   npm config set registry http://registry.cnpmjs.org/

然后再次运行安装命令：

   npm install -g @vue/cli

如果还是无法解决问题，可以尝试使用其他的 npm 注册表源，如淘宝源或官方源。

如果以上方法都没有解决问题，可能需要进一步检查你的网络环境和配置。