A systems engineer makes sure the computers, servers, networks and software a business depends on work together, stay secure, and can grow. You listen to what people need, choose the right components, build and connect them, watch them run, and fix problems before users notice. The path is very learnable for free: start with how computers and networks work, get comfortable in Linux, learn scripting and automation, then move into cloud and infrastructure as code. Most workers enter with a certificate or associate's degree, so a home lab and a portfolio of small projects count for a lot. No lice
See the full roadmap free
Every stage from beginner to expert, with lessons, practice drills, projects, interview questions and free resources. Free with a Rolearch account.
Stage 1 of 4 · about 12 weeks
Understand how computers, operating systems and networks work. Install and use Linux and Windows Server in virtual machines. Learn TCP/IP, DNS, DHCP, subnetting, and basic Bash scripting. Finish with a home lab: two VMs on one virtual network, one serving a web page and one acting as a DNS server.
How computers and operating systems work
Every system you will later design, patch or troubleshoot sits on the same basics. If you know what happens between pressing power and seeing a login prompt, problems stop feeling like magic and become a short list of places to look.
Linux command line and Windows Server basics
Most servers run Linux and you will mostly use a terminal with no mouse. Windows Server is still common in company networks. Being comfortable in both makes you useful on day one.
Networking: TCP/IP, subnetting, DHCP and DNS
Systems exist to talk to each other. Most 'the server is down' reports turn out to be a network, DNS or addressing issue. This is the skill that lets you tell the difference quickly.
Basic Bash scripting
Anything you do twice by hand is a script waiting to happen. Starting small now builds the automation habit that the later stages depend on.
Home lab: web server and DNS server on one virtual network
Employers trust what you have built. This lab combines everything so far and gives you something concrete to show and explain in an interview.
Then 3 more stages (about 110 weeks in all) with lessons, drills, projects, 10 interview questions with strong answers and free resources.