Dartmouth College
Skills you'll gain: Command-Line Interface, C (Programming Language), Linux Commands, Linux, Embedded Systems, File I/O, Embedded Software, Software Visualization, Programming Principles, Computer Engineering, Linux Servers, File Systems, System Programming, Algorithms, Computer Architecture, Computer Programming, Software Documentation, Computer Science, Software Engineering, Debugging
Beginner · Specialization · 3 - 6 Months

The Linux Foundation
Skills you'll gain: Package and Software Management, Linux, Command-Line Interface, File Systems, Unix Commands, Linux Administration, Linux Commands, User Accounts, System Configuration, Performance Tuning, System Monitoring, Operating Systems, Network Monitoring, Software Installation
Beginner · Course · 1 - 3 Months

Skills you'll gain: C (Programming Language), Game Design, Programming Principles, Program Development, Computational Logic, Data Validation, Command-Line Interface, User Interface (UI), Data Structures
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Bash (Scripting Language), Operating Systems, File Systems, Linux Commands, Linux, SQL, Unix, Database Management, Command-Line Interface, Relational Databases, Authorization (Computing), Authentications, User Accounts
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Package and Software Management, User Accounts, Unix Commands, Unix, Bash (Scripting Language), Command-Line Interface, Kubernetes, Git (Version Control System), GitHub, OS Process Management, Firewall, Ubuntu, Docker (Software), Containerization, Network Monitoring, Unix Shell, File Systems, Shell Script, TCP/IP, Version Control
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

Packt
Skills you'll gain: Package and Software Management, Linux Administration, Shell Script, Ubuntu, User Accounts, Linux, Unix Shell, Linux Servers, Linux Commands, Unix, Red Hat Enterprise Linux, Bash (Scripting Language), Kubernetes, Command-Line Interface, Network Troubleshooting, Containerization, Ansible, File Systems, Application Deployment, Authentications
Intermediate · Specialization · 1 - 3 Months

Coursera
Skills you'll gain: Linux Commands, Linux, Linux Servers, Command-Line Interface, Linux Administration, File Management, Unix Commands, File Systems
Beginner · Guided Project · Less Than 2 Hours

University of Colorado Boulder
Skills you'll gain: Linux, File Systems, Shell Script, Electrical Engineering
Advanced · Course · 1 - 4 Weeks

Birla Institute of Technology & Science, Pilani
Skills you'll gain: Linux Commands, Shell Script, Unix Commands, Systems Administration, File I/O, Data Management, Software Development, Process Management, Computer Security
Intermediate · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Linux, Linux Commands, Ubuntu, Linux Administration, File Management, Command-Line Interface, Servers, Operating Systems, Web Servers, IT Automation, MySQL, Open Source Technology, Service Management
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: System Support, System Configuration, Computer Literacy, System Requirements, General Networking, Computer Security Awareness Training
Beginner · Course · 1 - 3 Months