- http://ryanlue.com/posts/2017-06-29-gpg-for-ssh-auth
- https://learntemail.sam.today/blog/selinux-concepts-but-for-humans/
- https://stackoverflow.com/questions/28357997/running-programs-in-parallel-using-xargs
- https://cloud.google.com/security/security-design/
- http://unixseclab.com/index.php/2017/01/09/ssh-start-to-finish-certificate-authority-basics/
- https://charity.wtf/2017/05/11/the-engineer-manager-pendulum/
- https://medium.com/quick-mobile/monitoring-containers-with-prometheus-ffde286c17f7#.rzw5y9by3
- http://harish11g.blogspot.com/2014/08/amazon-cloudformation-templates-automation-Amazon-CFT-AWS-top-best-practices-tips.html
# trace system calls
strace curl https://www.google.com |& grep open