download

https://flutter.dev/docs/get-started/install/linux

https://storage.googleapis.com/flutter_infra/releases/stable/linux/flutter_linux_2.0.5-stable.tar.xz

export

export FLUTTER_STORAGE_BASE_URL="https://mirrors.tuna.tsinghua.edu.cn/flutter” export PUB_HOSTED_URL="https://mirrors.tuna.tsinghua.edu.cn/dart-pub”