Caution
The package sign key is changed since this release. Import the new package sign key before updating groogna packages.
Debian/Ubuntu:
% sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com F10399C0
% sudo apt-get update
% sudo apt-get -V -y install groonga-keyring
CentOS/Fedora:
% sudo yum update
% sudo yum install --nogpgcheck -y groonga-repository