How to install binary version of https://www.yubico.com/support/downloads for Ubuntu. I'm using 14.04 LTS.
Also how to fix "An unexpected error has occurred" in Google Account
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This is the official PPA, open a terminal and run
sudo add-apt-repository ppa:yubico/stable sudo apt-get update sudo apt-get install yubikey-personalization yubikey-personalization-gui
To enable use without sudo (e.g. Google Chrome), update
cd /etc/udev/rules.d/ sudo wget https://raw.githubusercontent.com/Yubico/libu2f-host/master/70-u2f.rules sudo service udev restart