如何在没有Display / GUI的Ubuntu远程服务器上安装Android SDK命令行工具。 运行时，“ flutter upgrade”会显示以下内容，我想知道是否可以使用Android SDK命令行工具来解决此问题。
$flutter upgrade
Upgrading Flutter from /home/yvelumani/flutterDev/sdk/flutter...
Building flutter tool...`
Upgrading engine...
Downloading Android Maven dependencies...
Failed to download the Android dependencies
Downloading Android Maven dependencies... 127.7s (!)
Flutter 1.22.0-10.0.pre.133 • channel master • https://github.com/flutter/flutter.git
Framework • revision 577de1c44e (46 minutes ago) • 2020-09-10 15:55:03 -0700
Engine • revision fee6f9e533
Tools • Dart 2.10.0 (build 2.10.0-110.0.dev)
Running flutter doctor...
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel master, 1.22.0-10.0.pre.133, on Linux, locale en_US.UTF-8)
[!] Android toolchain - develop for Android devices
✗ Unable to locate Android SDK.
Install Android Studio from: https://developer.android.com/studio/index.html
On first launch it will assist you in installing the Android SDK components.
(or visit https://flutter.dev/docs/get-started/install/linux#android-setup for detailed instructions).
If the Android SDK has been installed to a custom location, set ANDROID_HOME to that location.
You may also want to add it to your PATH environment variable.
✗ Android SDK file not found: adb.
[!] Android Studio (not installed)
[✓] Proxy Configuration
[!] Connected device
! No devices available
! Doctor found issues in 3 categories.
我已经从https://developer.android.com/studio#command-tools下载了android SDK命令行工具。但是我不确定如何安装此工具，以及选择哪种路径作为ANDROID_HOME？
注意：我不能/不能使用Android Studio进行应用开发。
非常感谢您的帮助。