Common

git with ssh key

$ tee ~/.ssh/config << EOF
Host github.com
     Hostname github.com
     IdentityFile ~/.ssh/github_rsa
     User git
EOF
$ chmod 600 ~/.ssh/config

git-lfs (git large file storage)

Install

$ cd /tmp
$ curl -OL https://github.com/git-lfs/git-lfs/releases/download/v2.2.1/git-lfs-linux-amd64-2.2.1.tar.gz
$ tar -vxzf git-lfs-linux-amd64-2.2.1.tar.gz
$ cd git-lfs-2.2.1
$ sudo ./install.sh

How to install DC/OS on AWS with Ansible

go to wiki page