deb http://ppa.launchpad.net/justzx2011/openyoudao-v0.4/ubuntu trusty main deb-src http://ppa.launchpad.net/justzx2011/openyoudao-v4.0/ubuntu trusty main
sudo apt-key adb --keyserver keyserver.ubuntu.com --recv-keys 14C9B91C3F9493B9 sudo apt-get update sudo apt-get install -y openyoudao