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sudo apt-get update
sudo apt-get install -y wget
sudo wget https://repo.percona.com/apt/percona-release_0.1-4.$(lsb_release -sc)_all.deb
sudo dpkg -i percona-release_0.1-4.$(lsb_release -sc)_all.deb
sudo apt-get update
# install without password prompt
echo "percona-server-server-5.5 percona-server-server/root_password password '12345'" | debconf-set-selections
echo "percona-server-server-5.5 percona-server-server/root_password_again password '12345'" | debconf-set-selections
apt-get install -y -q percona-server-server-5.5