Temporarily install dev version of Dart on Ubuntu

I like to quickly be able to install rc version of the lastest dart available. Below is the quick way

sudo sh -c 'curl https://storage.googleapis.com/download.dartlang.org/linux/debian/dart_unstable.list > /etc/apt/sources.list.d/dart_unstable.list'
sudo apt-get update
sudo apt-get install dart

And to switch back to the stable version

sudo rm /etc/apt/sources.list.d/dart_unstable.list
sudo apt-get update
sudo apt-get install dart

Or to force installation of the stable version

sudo apt-get install dart/stable

Dartium can be found here: https://www.dartlang.org/downloads/archive

Content shell can be found here:
dev: http://gsdview.appspot.com/dart-archive/channels/dev/release/latest/dartium/
stable: http://gsdview.appspot.com/dart-archive/channels/stable/release/latest/dartium/


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