HR representative conducts a brief phone or video call to confirm basic qualifications, discuss the candidate’s background, and understand their interest in the role. Questions might cover work experience, key skills (e.g., familiarity with Linux distributions, scripting languages, networking), and availability. A technical recruiter or a junior admin conducts a more in-depth phone or video interview focused on technical skills. Questions could include basics of Linux command line, file systems, user management, process management, and basic networking.