FlutterProjects/flutter/bin/flutter: line 33: sed: command not found

hari ini saya jumpa error semasa pasang flutter.command not found  ini eror yang saya jumpa. ini path yang sepatutnya anda buat

 

 dan bukan begini

export PATH=[/Users/username/Development]/flutter/bin:$PATH

https://flutter.io/setup-linux/

 https://github.com/flutter/flutter/issues/15775

flutter doctor