Use iostat to evaluate disk I/O performance. Which metrics would you focus on to identify a slow disk, and how would you collect and interpret the data?
Check per-CPU utilization using mpstat and determine if a specific CPU core is under pressure.
Use sar to view historical CPU performance. How do you identify a past CPU bottleneck over the last 2 hours?
Use top to identify a memory-hungry process and explain how to sort and interpret results.
Monitor the system graphically using gnome-system-monitor. What steps would you follow to identify high CPU processes?
You suspect CPU resource contention on a RHEL 9 system. Use vmstat to monitor CPU usage and interpret the output to determine if the system is CPU-bound.
