After this lesson, you will be able to: Translate Linux + CLI skills into resume bullets, portfolio pieces, and interview answers for entry-level DevOps / sysadmin / SRE roles.
Linux is the foundation. Every DevOps interview includes a 'tell me about a server you've run' question. This is the lesson that turns the work into the answer.
Junior DevOps Engineer / Sysadmin: $70-$120k entry. Junior SRE: $90-$150k (often requires CS degree, but the bar is dropping). Cloud Support Engineer (AWS / GCP / Azure): $80-$130k. IT Operations Engineer: $65-$110k. Linux skills are foundational; specialty (cloud, containers, security) determines the title.
Skills: Linux (Ubuntu, RHEL), bash scripting (set -euo pipefail), SSH key auth + hardening, systemd, nginx, UFW + fail2ban, cron, package management (apt/dnf), unattended-upgrades, vim. Projects: 'Set up + hardened an Ubuntu VPS with a public URL; live at <url>; deploy script in <repo>.' 'Wrote 3 bash scripts (backup, log rotation, deploy) used in personal projects.' 'Author of 2 blog posts: hardening a $5 VPS, debugging systemd services.' Certs: CompTIA Linux+ or LFCS (Linux Foundation Certified System Administrator).
'Walk me through what happens when you ssh into a server.' (DNS → TCP → key auth → shell.) 'How do you check what's running on a server?' (ps, top, systemctl, ss.) 'How do you secure a fresh VPS?' (Bring the hardening checklist.) 'What's the difference between a process and a thread?' 'Write a one-line shell pipeline that does X.' (Often involves grep + awk + sort + uniq.) 'You SSH in and ls hangs. What do you do?' (Tests methodical thinking under pressure.)
Two of these inside 30 days.
Ship the do-linux-passion project with a live URL.
Write a blog post: 'How I hardened my $5 VPS' or 'systemd debugging cheat sheet'.
Contribute to an open-source ops project (e.g. ansible role, docker image hardening).
Pass CompTIA Linux+ or LFCS if budget allows.
Maintain a public dotfiles repo (vim config, bash aliases, ssh-config template).
Listing 'Linux' without owning a server. Treating Linux as 'just an OS'. The CLI mastery is the actual skill. Skipping bash scripts in your portfolio. Even simple ones prove you can automate. Forgetting to mention security hardening. Every hiring manager wants to know you wouldn't ship an open port 22 with root login enabled.
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