Different ways to reload or restart Firewalld

Question

To reload firewalld I could use:

• firewall-cmd --reload or
• firewall-cmd --complete-reload

How do those differ from:

• systemctl reload firewalld and
• systemctl restart firewalld

Answer 1

Short answer is that technically they do the same.

It depends on how long the Init.d system will stay on a specific distribution, as I remember systemd will be the "successor" of it.