• Linux Administration (RHCE) …
• CCNA (Cisco Certified Network Associate) …
• CCNP – Switch (Cisco Certified Network Professional – Switch) …
• CCNP – Router (Cisco Certified Network Professional – Router) …
• CEH 10.0 (Certified Ethical Hacking – EC Council – Global Certification) …
• ECSA (Certified Security Analyst – EC-Council)

Here are the few.

If you’re interested in learning about cybersecurity, ethical hacking, and related topics, consider looking into legitimate and recognized educational programs, certifications, and courses offered by reputable organizations and institutions. Some of these include:

1. Certified Ethical Hacker (CEH): Offered by the EC-Council, this certification focuses on ethical hacking tools and techniques, penetration testing, and various aspects of cybersecurity.
2. CompTIA Security+: This certification covers a wide range of foundational security topics and is recognized in the industry as a good starting point for those interested in cybersecurity.
3. Cybersecurity Specializations on Coursera and edX: Online learning platforms like Coursera and edX offer courses and specializations in cybersecurity and related fields from universities and institutions worldwide.
4. SANS Institute: SANS offers various cybersecurity training courses, including those related to penetration testing, incident response, and more.
5. Offensive Security Certified Professional (OSCP): Offered by Offensive Security, this certification is highly regarded in the penetration testing and ethical hacking community.
6. Cybrary: An online platform that provides free and paid courses on a wide range of cybersecurity topics, from beginner to advanced levels.
7. Udemy: Udemy offers a variety of cybersecurity courses taught by industry professionals. Look for courses with good reviews and ratings.
8. Local Universities and Colleges: Many educational institutions offer cybersecurity programs and courses that can provide a solid foundation in the field.
9. Capture The Flag (CTF) Challenges: Participating in CTF challenges on platforms like Hack The Box, TryHackMe, and others can help you practice your skills in a controlled environment.

Always ensure that you are pursuing legitimate and ethical avenues of study in the field of cybersecurity. Ethical hacking is about understanding security vulnerabilities in order to protect systems and networks, not to exploit them for malicious purposes. It’s important to approach this field with a responsible and ethical mindset.