### Openstack
1.  https://www.openstack.org/coa/
2. https://training.linuxfoundation.org/certification/linux-foundation-certified-sysadmin-lfcs/
3. https://www.redhat.com/en/services/certification/rhcsa

**Linux Foundation, A Cloud Guru, Udemy, Coursera:** These platforms offer a wider range of OpenStack courses, often more vendor-neutral. Look for courses covering specific OpenStack services (Nova, Neutron, Cinder, Glance, Keystone, etc.) and advanced topics like troubleshooting, scaling, and automation.

Cloud Security Certifications (e.g., CompTIA Security+, Certified Cloud Security Professional (CCSP))
### Programming
- https://www.edx.org/certificates/professional-certificate/dartmouth-imtx-c-programming-with-linux
- https://pythoninsFtitute.org/