Hello Flutter

My Dev Space Specs

Flutter (Channel stable, 2.5.3, on Ubuntu 21.10 5.13.0-21-generic, locale en_IN)
Android SDK (version 31.0.0)
Android Studio (version 2020.3)
VS Code (version 1.62.0)
Ubuntu (version 21.10)

Install Flutter in Ubuntu 21.10

Install java its needed for Android App dev later stage sudo apt-get install openjdk-8-jdk will go with open jdk as other guy is harder to install.
Use snap to install flutter sudo snap install flutter --classic
Next install Android Studio using snap sudo snap install android-studio --classic, then configure it.
Go to Preferences > Appearance Behavior > System Settings > Android SDK > SDK Tools and install Android SDK Command-line Tools (latest)
Execute flutter sdk-path to let flutter install some dependecies and wait for it to finish.
Run flutter doctor --android-licenses
Finally run flutter doctor everything should be checked by now.

This app

Created using flutter create appname
To run flutter run