Duke University
Skills you'll gain: Pandas (Python Package), Bash (Scripting Language), Version Control, Jupyter, Linux Commands, Git (Version Control System), Shell Script, Linux, Web Scraping, Linux Administration, Data Manipulation, MySQL, Microservices, AWS SageMaker, SQL, JSON, Cloud Engineering, Python Programming, Big Data, Data Science
Beginner · Specialization · 3 - 6 Months

LearnQuest
Skills you'll gain: Package and Software Management, Linux Administration, Linux, System Monitoring, Linux Commands, Operating System Administration, File Systems, User Accounts, Command-Line Interface, Systems Administration, Data Storage, System Configuration, File Management, Data Storage Technologies, Network Monitoring, Network Administration, Software Installation, Network Troubleshooting
Beginner · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Virtual Private Networks (VPN), Linux Administration, Public Key Infrastructure, Linux, Linux Servers, Intrusion Detection and Prevention, Firewall, Remote Access Systems, Operating System Administration, Authentications, Authorization (Computing), Network Security, Security Controls, Infrastructure Security, Identity and Access Management, System Monitoring, File Management, Systems Administration, Cybersecurity, Information Technology
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Linux Administration, Linux, Performance Tuning, Virtualization, Computing Platforms, Virtual Machines, Data Storage Technologies, Cloud Applications, Security Controls, Mainframe Computing, Hardware Architecture, Infrastructure Architecture, Virtual Networking, Artificial Intelligence and Machine Learning (AI/ML), Scalability
Beginner · Course · 1 - 3 Months

Skills you'll gain: Linux Administration, File Systems, Linux, File Management, Firewall, Remote Access Systems, Network Troubleshooting, Command-Line Interface, Unix Commands, System Support, Virtual Machines, Scripting
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Linux Commands, Linux Administration, Network Troubleshooting, Linux, Network Administration, File Transfer Protocol (FTP), Virtual Networking, TCP/IP, Network Infrastructure, Network Protocols, Command-Line Interface, System Configuration, Virtualization, General Networking, Software Installation
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: System Configuration, Server Administration, Cloud Infrastructure
Beginner · Course · 1 - 4 Weeks

EDUCBA
Skills you'll gain: File Systems, Linux Administration, Linux Servers, Linux, Linux Commands, Software Installation, Data Storage, Data Management, System Configuration, Data Integrity, Data Migration, Command-Line Interface, System Monitoring, System Requirements
Intermediate · Course · 1 - 4 Weeks
Skills you'll gain: Vulnerability Scanning, Digital Forensics, Linux, Linux Administration, Network Security, User Accounts, Network Monitoring, System Monitoring, Hardening, Continuous Monitoring, Information Systems Security, Security Controls, Wireless Networks, Penetration Testing, Cybersecurity, Containerization, Incident Response
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Ansible, Ubuntu, Linux Servers, WordPress, Linux Administration, Remote Access Systems, Linux, Linux Commands, Nginx, Servers, Web Servers, Software Installation, Systems Administration, Virtual Machines, Web Development, MySQL, PHP (Scripting Language)
Beginner · Course · 1 - 3 Months

Skills you'll gain: Distributed Denial-Of-Service (DDoS) Attacks, Metasploit, Penetration Testing, Malware Protection, Exploitation techniques, Database Management, Cyber Threat Intelligence, Vulnerability Assessments, Cyber Security Assessment, Brute-force attacks, Cryptography, Cybersecurity, Vulnerability Scanning, Intrusion Detection and Prevention, Data Import/Export, MySQL, Encryption, Mobile Security, Linux, Linux Administration
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Apache, Network Troubleshooting, OSI Models, File Transfer Protocol (FTP), Linux Administration, Linux Servers, TCP/IP, Network Protocols, Linux Commands, Linux, Dynamic Host Configuration Protocol (DHCP), Virtual Networking, General Networking, Virtual Machines, Web Servers, Remote Access Systems, Network Infrastructure, Network Administration, Computer Networking, Network Analysis
Intermediate · Specialization · 1 - 4 Weeks