Scenar.io - Interactive Linux Debugging Practice
Practice Linux troubleshooting for DevOps and SRE interviews with an AI-powered
interviewer that simulates realistic production systems.
How It Works
Each scenario presents a broken production system. Describe your debugging approach in
natural language -- the AI returns realistic command outputs, tracks your clue discovery,
and evaluates your methodology across three stages: root cause identification, short-term
fix, and long-term prevention.
Practice Modes
-
Debugging Simulation - 18+ scenarios across Linux, networking,
containers, and security
-
Verbal Interview - Conceptual Q&A with AI scoring on accuracy,
completeness, and communication
-
Sandbox Exploration - Open-ended system exploration without a specific
bug to find
Debugging Scenarios
- Disk Has Space But Can't Create Files (inode exhaustion)
- Application Keeps Getting Killed (OOM Killer)
- Can't Reach External APIs (DNS resolution failure)
- Cannot Assign Requested Address (port/TIME_WAIT exhaustion)
- Docker Container Crash Loop
- SSL Certificate Expired
- Application Memory Leak (Java heap analysis)
- Disk I/O Bottleneck
- Single CPU Core Maxed Out
- Something's Not Right Here (compromised binary detection)
- Script Works Manually But Fails in Cron (SELinux/noexec)
- ...and 7 more scenarios
Features
- AI interviewer powered by Claude Sonnet 4.5 with 3 difficulty levels
- Custom scenario generation from any topic description
- Voice input for verbal interviews
- XP system, achievement badges, daily streaks, and global leaderboard
- Challenge friends with shareable links
- 12 terminal themes including Tokyo Night, Dracula, and Solarized
Pricing
Free: 5 debugging scenarios/month, 3 verbal interviews/month, 2 sandbox
sessions/month.
Pro ($9/month): Unlimited everything, custom generation, all
difficulties, lifetime stats.
Built by Ashot Arushanyan. Live at scenar.site.