How to do it...

1. First, download and install the OpenPGP key for the Mesosphere packages:

$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv E56151BF

1. Now install the Mesosphere repository:

$ DISTRO=$(lsb_release -is | tr '[:upper:]' '[:lower:]')
$ CODENAME=$(lsb_release -cs)
$ echo "deb http://repos.mesosphere.io/${DISTRO} ${CODENAME} main"|
sudo tee /etc/apt/sources.list.d/mesosphere.list

1. Update the apt-get package indexes:

$ sudo apt-get update

1. Install Mesos and the included ZooKeeper binaries:

$ sudo apt-get -y install mesos 

1. At this point, you can start Mesos to do some basic testing. To start the Mesos master and agent (slave) daemons, execute the following command:

$ sudo service mesos-master start
$ sudo service mesos-slave start 

1. To validate the Mesos installation, open a browser and point it to http://<ipaddress>:5050. Replace <ipaddress> with the actual address of the host with the new Mesos installation.