If you are a BSc, BCA or diploma student who wants a DevOps job, Linux is the first thing to learn, because it is what nearly every server and cloud instance runs. You need about three months of focused Linux work before Docker, CI/CD and Kubernetes will make sense. This guide explains why Linux comes first, gives a checklist of what to learn, estimates how long it takes, names the gaps non-CS graduates usually have, and shows the path through Techcake's Linux course, DevOps Engineer course and Career Program, with free practice resources at the end.
Linux comes first because DevOps tools are Linux tools. Docker containers are Linux processes. Kubernetes nodes are Linux machines. CI/CD pipelines run shell commands on Linux runners. Terraform builds cloud servers that boot Linux. When any of these break, the fix is a Linux command.
The numbers back this up. W3Techs measures Unix-family operating systems on 92.0 percent of websites whose server operating system it can identify, with Linux the dominant member of that family. Microsoft, whose own server operating system is Windows, reports that more than 60 percent of customer compute cores on Azure run Linux and that Linux cores are growing faster than Windows cores.
Interviewers for junior DevOps and cloud roles test Linux first, because a candidate who cannot read a log, fix a permission or restart a service cannot be trusted with a pipeline that does those things automatically.
You are ready for DevOps tools when you can do everything in this checklist without looking it up. Work top to bottom; each row builds on the one above.
| Area | You should be able to | Commands and files |
|---|---|---|
| Shell basics | Navigate, copy, move, delete, search inside files, chain commands, redirect output | cd, ls, cp, mv, rm, find, grep, less, pipes, > and >> |
| Text processing | Extract a column, count matches, replace text, read a log for one error | cut, sort, uniq, wc, sed, awk, tail, journalctl |
| Editors | Edit a config file on a server with no GUI | vim or nano |
| Users and permissions | Create a user, add to a group, set file ownership and mode, use sudo safely | useradd, usermod, chown, chmod, sudo, /etc/passwd, /etc/sudoers |
| Processes | Find what is using CPU or a port, stop it, run something in the background | ps, top, kill, ss, nohup, & |
| Services | Start, stop, enable and check a service and read its logs | systemctl, journalctl, unit files under /etc/systemd |
| Packages | Install, update and remove software on Debian and Red Hat families | apt, dnf, rpm, dpkg |
| Storage | Add a disk, partition, create a file system, mount, extend a volume | lsblk, fdisk, mkfs, mount, /etc/fstab, LVM |
| Networking | Explain IP, subnet, gateway, DNS and ports; test connectivity; read a firewall rule | ip, ss, ping, dig, curl, /etc/hosts, /etc/resolv.conf, firewalld or ufw |
| SSH | Log in with keys, copy files, run a command remotely, harden sshd | ssh, ssh-keygen, scp, /etc/ssh/sshd_config |
| Shell scripting | Write a script with variables, conditions, loops and functions that automates a real task | bash, cron, exit codes |
| Troubleshooting | Diagnose disk full, service down, port blocked, wrong permission, DNS failure | df, du, journalctl, ss, dig |
This is close to the RHCSA syllabus, which the Linux System Administration course follows because it is a complete definition of a competent Linux administrator. Techcake does not run or coordinate the Red Hat exam.
Three months of consistent work is the realistic figure for the checklist. At about 10 hours a week that is roughly 120 hours, most of them at a terminal.
Month one is the shell, files, permissions, users and an editor. Month two is processes, services, packages, storage and networking. Month three is SSH, scripting and troubleshooting, where you break a virtual machine on purpose and repair it.
After that, DevOps tools go faster because they reuse what you know: Docker about a month, Git and CI/CD another, AWS and Terraform two, Kubernetes two more. Our DevOps roadmap for freshers lays out that sequence month by month.
Most BSc, BCA and diploma students arrive with the same missing pieces. None is a barrier once named.
Networking fundamentals. Many syllabuses teach the OSI model on paper but not what a subnet mask does to a real packet. You should be able to explain why 10.0.1.5 cannot reach 10.0.2.9 and what a firewall rule must say for it to work.
The command line as a workplace. Students raised on Windows GUIs find the terminal unnatural. The fix is volume: use Linux daily for three months.
Reading documentation. Coursework gives you a textbook; work gives you man pages. Read man chmod and man systemctl until the format is familiar.
Debugging without a teacher. College labs have an expected answer. Production has an error message and a clock. Practise on broken systems.
Version control. Many graduates have never used Git beyond a final-year upload. It is required from the first week of any DevOps job.
Scripting rather than programming. A BCA graduate may know Java or C but has never written a 30-line Bash script that rotates logs. DevOps needs the script more than the program.
Diploma holders often have a strength here: their hardware and networking labs are usually more practical, so storage and networking land faster.
Start with Linux, then choose between the DevOps Engineer course and the full Career Program depending on your time and goal.
Step 1, Linux. Starting from zero, take the three-month Linux System Administration course or work through the checklist with the free resources below. Do not skip this to reach the tools faster; you will come back to it anyway.
Step 2, DevOps tools. The four-month DevOps Engineer course covers Linux and networking foundations, Docker, CI/CD with Git, Jenkins and GitHub Actions, and AWS with Terraform. It runs Online Live, Hybrid and Offline, so a final-year student can do it alongside college. After a Linux course, the first module is revision.
Step 3, projects. The ten-month DevOps Engineer Career Program is the direct route: four months of training, then six months of project-based training on campus in Kannur, building six production projects from Linux infrastructure through Docker, CI/CD, AWS migration, Kubernetes on EKS and Terraform with Prometheus and Grafana. With the DevOps Engineer course or equivalent fundamentals done, you can enter the six-month DevOps project-based training on its own.
Which route. Still in college with a year left: do Linux now and the DevOps Engineer course in your final year. Graduated with ten months to give: the Career Program is the shortest path to a portfolio. If you are searching for a DevOps internship after your BCA or diploma, project-based training is what Techcake offers instead: a defined syllabus, a mentor who reviews everything, and six projects to show an employer.
Each stage opens different entry roles. Titles vary by company, so look at responsibilities rather than labels.
After Linux only: Linux support engineer, NOC engineer, junior system administrator, and technical support at hosting or managed-services companies. Many DevOps engineers started here, paid to keep learning on real servers.
After Docker, Git and CI/CD: junior DevOps engineer or build and release engineer, keeping pipelines and containers running.
After AWS and Terraform: cloud support associate, junior cloud engineer, and DevOps roles at companies migrating to AWS, where infrastructure-as-code skills are the filter.
After Kubernetes and observability: the full junior DevOps or platform engineer role, and site reliability engineering trainee positions at larger organisations.
Techcake does not guarantee any of these. Career support means a 1-on-1 resume review with a working engineer, a LinkedIn rebuild, recorded mock interviews, alumni Slack and WhatsApp groups, and referrals through the mentor network. The employer decides.
Everything here is free and works on a low-end laptop or in a browser.
Linux Journey covers the shell, users, permissions, processes and networking in short lessons. Month one.
Introduction to Linux (LFS101) is the Linux Foundation's free course and maps well to the checklist.
OverTheWire Bandit is a set of command-line puzzles that build fluency fast. Finish it before Docker.
Linux Upskill Challenge is a free month-long course where you run your own server and do one task a day. Month two.
SadServers gives you broken Linux servers to fix in the browser. Month three.
MIT Missing Semester covers the shell, editors, Git and data wrangling that degree courses skip.
GNU Bash manual is the scripting reference once you outgrow tutorials.
Killercoda has free Linux, Docker and Kubernetes scenarios to preview the next stage without installing anything.
Docker Get Started and the Pro Git book are the official free references for the first two DevOps tools you will meet.
Install Linux on a real machine as well. A used laptop with Ubuntu or Rocky Linux, or a VirtualBox VM, is something you can break and rebuild.
Not sure whether to start with Linux or go straight to DevOps? Message us on WhatsApp and a counsellor will call you back within a business day, ask where you are, and tell you which course fits. Fees and EMI options are shared on that call, along with the next batch date shown on the page. Or call +91 9544 95 7747.
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