Information Security

https://www.sans.org/

https://www.isc2.org/#

https://en.wikipedia.org/wiki/Certified_Information_Systems_Security_Professional

https://www.reddit.com/r/cissp/comments/92ciry/cissp_official_study_guide_8th_edition_pdf/

https://www.amazon.com/dp/B015E6IU10/ref=cm_sw_r_cp_apa_HIM7FbS71DT15

https://www.sans.org/

https://www.udemy.com/course/lpi-010-150-linux-essentials/

Udemy and coursera are good resources

Google "GitHub cissp resources" or infosec

https://github.com/onlurking/awesome-infosec