Skills you'll gain: Application Security, OAuth, Data Validation, Authentications, Secure Coding, Identity and Access Management, Web Applications, Authorization (Computing), Cyber Attacks, Distributed Denial-Of-Service (DDoS) Attacks, Data Integrity, Server Side, Security Strategy, Package and Software Management, Patch Management
★ 4.9 (17) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Apache, File Transfer Protocol (FTP), Linux Servers, Linux Administration, Linux, Web Servers, Remote Access Systems, Command-Line Interface, Unix Commands, File Management, Network Protocols, Network Performance Management, Security Controls
Intermediate · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Version Control, Git (Version Control System), Linux, DevOps, Development Environment, Application Deployment, Virtualization, Cloud Computing, Linux Administration, Devops Tools, Cloud Infrastructure, Containerization, Cloud Platforms, Infrastructure As A Service (IaaS), Software Versioning, Virtualization and Virtual Machines, Software As A Service, Virtual Networking, Virtual Machines, Platform As A Service (PaaS)
★ 4.4 (162) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Penetration Testing, Exploitation techniques, Network Security, Intrusion Detection and Prevention, Hardening, Local Area Networks, Threat Detection, General Networking, Linux, System Configuration, Software Installation, Virtual Machines, Network Analysis, Virtualization
Intermediate · Course · 1 - 3 Months

University of Colorado System
Skills you'll gain: Firewall, Network Security, Intrusion Detection and Prevention, Cyber Security Policies, Security Controls, Infrastructure Security, Threat Detection, System Monitoring, Linux Administration, Linux, Linux Commands, Data Integrity
★ 3.9 (62) · Intermediate · Course · 1 - 4 Weeks

Packt
Skills you'll gain: Security Testing, Cybersecurity, Network Security, Brute-force attacks, TCP/IP, Network Monitoring, Vulnerability Assessments, Servers, Network Analysis, Network Protocols, Program Development
Intermediate · Course · 1 - 3 Months

University of London
Skills you'll gain: Linux, Linux Commands, Computer Systems, Command-Line Interface, Cybersecurity, Computer Architecture, Network Security, Cyber Attacks, Vulnerability Assessments, Hardware Architecture, Information Systems Security, Application Security, Threat Detection, Authorization (Computing), Network Protocols, Virtual Private Networks (VPN), Operating Systems, VPN Clients, Systems Architecture, Authentications
★ 4.8 (45) · Beginner · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Linux Commands, Linux, Command-Line Interface, File Management, Unix Shell, Linux Administration, Package and Software Management, DevOps
★ 4.5 (160) · Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: Linux Commands, Network Administration, Unix Shell, Network Analysis
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Shell Script, Bash (Scripting Language), User Accounts, Linux Administration, Linux, Unix Shell, Linux Commands, User Provisioning, Unix, Operating System Administration, File Systems, Performance Tuning, Systems Administration, File I/O, Scripting, File Management, Scripting Languages, Data Storage, Authorization (Computing), Command-Line Interface
★ 4.7 (10) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Data Maintenance, Operating System Administration, Linux Commands, iSCSI Configuration, Network Engineering, File Management, System Software, Software Installation, Memory Management, Encryption
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Linux, Linux Administration, Red Hat Enterprise Linux, File Systems, Scripting, Linux Servers, Operating System Administration, Shell Script, System Configuration, Linux Commands, Unix Shell, Systems Administration, Web Servers, Bash (Scripting Language), Servers, System Monitoring, IT Automation, File Management, Command-Line Interface, OS Process Management
Mixed · Course · 1 - 4 Weeks