Not just commands - real troubleshooting methodology. Disk pressure, runaway processes, service failures. See how candidates diagnose and safely remediate the classic Linux incidents before they have root on your production servers.
10-20 min assessments · df/du/lsof proficiency · Safe cleanup verification · Classic Linux incidents
Disk full and runaway processes are 30-year-old problems - and still the #1 cause of outages. We test whether candidates can actually fix them safely.
Track their diagnostic workflow - do they check disk before processes? Use lsof to check open files? Verify cleanup worked? See their methodology, not just the final answer.
Critical for sysadmins - see who checks what they're deleting, who verifies backups exist, who understands the blast radius of rm commands on production systems.
Distinguish surface-level fixes from deep understanding. Did they just delete logs or understand why rotation failed? Did they restart the service or actually fix the config?
Anyone can list commands on a resume. Real Linux administration requires pattern recognition and safe instincts under pressure.
Disk full, runaway processes, zombie services - these have been Linux admin issues for 30 years. They're still relevant because they still happen. You need admins who've actually debugged them.
The difference between junior and senior Linux admins comes down to safety. Do they check before deleting? Understand process dependencies? See their instincts before they have root access.
Fast remediation matters when systems are down. But fast and wrong makes it worse. Assessments show you who can balance speed with accuracy - the hallmark of experienced admins.
Core Linux administration scenarios that every sysadmin should handle confidently.
A service is failing health checks with a 99% full root filesystem. Candidates must investigate /var/log, identify oversized files, understand which logs are safe to truncate vs. compress, and restore service without data loss.
A process is consuming 100% CPU, degrading system performance. Candidates must identify the process, understand why it's spinning (not just what it is), and safely remediate without causing additional issues.
A service health check is failing due to malformed JSON configuration. Tests safe file editing, JSON validation, service restart procedures, and verification. Classic config management scenario.
An API is responding slowly due to CPU throttling and suboptimal limits. Candidates must diagnose resource constraints, analyze process behavior, and tune system limits to restore performance.
RHEL, CentOS, specific daemons, custom tooling - we build scenarios for your actual Linux environment and common failure modes.
Talk to UsSee their diagnostic workflow - do they check disk before processes? Do they use lsof to check open files? Do they understand command outputs or just run commands?
Critical for Linux admins - see who checks before deleting, who verifies backups, who understands the blast radius of system-level changes.
Track usage of classic Linux tools - df, du, lsof, strace, netstat, ss, systemctl. See who knows the right tool for the job vs. who uses familiar commands ineffectively.
Distinguish surface-level fixes from deep understanding. Did they just delete logs or understand why rotation failed? Did they restart the service or fix the config?
See who documents their changes, who checks what they modified, who leaves breadcrumbs. Important for shared administration environments.
Best admins verify fixes. Track who re-checks disk space after cleanup, who tests service health after restart, who confirms the problem is solved.
Our scenarios use Ubuntu/Debian-based environments by default, but the skills transfer to any Linux distribution. We focus on universal Linux concepts - systemd, standard filesystem layout, common CLI tools - that any experienced Linux admin should know regardless of distro preference. We can customize for RHEL/CentOS or other distributions if needed for your environment.
Our Linux scenarios focus on CLI troubleshooting and system debugging rather than scripting. We test bash command proficiency, pipe usage, regex, and tool combinations - the daily skills of Linux administrators. If you need bash scripting or Python automation assessment, we can discuss custom scenarios that include scripting components.
Linux admin scenarios focus on system-level troubleshooting - disk, processes, services, performance. Data Center scenarios include hardware diagnostics (GPU drivers, PCIe, physical hardware enumeration) typically needed in data center environments. Linux admin roles are more about managing the OS; Data Center roles include hardware awareness. Many assessments overlap - disk space issues appear in both - but the context differs.
See how candidates handle disk pressure, runaway processes, and service failures before they have root on your boxes.