diff --git a/README.md b/README.md
index c6175b8..4879c36 100644
--- a/README.md
+++ b/README.md
@@ -2610,6 +2610,7 @@ A small group of programmers wants to change how we code—before catastrophe st
 * [Tom Ryder](https://sanctum.geek.nz/arabesque/cron-best-practices/) - (2016) Cron best practices
 * [Jonathan Lozada De La Matta (Red Hat)](https://opensource.com/article/18/7/sysadmin-tasks-ansible) - (2018) A sysadmin's guide to Ansible: How to simplify tasks
 * [Vivek Gite](https://www.cyberciti.biz/tips/linux-unix-bsd-openssh-server-best-practices.html) - (2018) Top 20 OpenSSH Server Best Security Practices
+* [CertDepot](https://www.certdepot.net/rhel7-get-started-systemd/) - (2018) RHEL7: How to get started with Systemd.
 
 ## Emacs
 * [emacs-tw/awesome-emacs](https://github.com/emacs-tw/awesome-emacs) - list of useful Emacs packages, libraries and others.