DevOps, SRE & Cloud
Linux & Systems
6 practice questions. Free questions open a full answer guide; the rest unlock with Pro.
- A container keeps getting killed with an OOMKilled status even though the host has plenty of free memory. Explain what's actually happening at the Linux level and how you'd reason about it.
- A Linux server's disk is reporting full. How would you investigate and free up space?Go Pro
- A box has a load average of 30 but top shows CPU mostly idle. What does load average actually measure, and how would you track down the cause?Go Pro
- A Linux service keeps getting killed and the logs say 'Out of memory: Killed process'. What's happening, and how do you diagnose and prevent it?Go Pro
- Explain how Linux file permissions work, and what the permissions 755 and 644 mean.Go Pro
- You get paged that a Linux host has a load average of 40 on an 8-core box, but it doesn't feel like the CPU is pegged. How do you figure out what's actually wrong?Go Pro
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