Use iotop to monitor real-time I/O per process. How do you identify heavy disk users?
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?
You are troubleshooting a power-optimized server. Use tuned-adm to verify and set the power-saving profile.
You are asked to increase the maximum number of open files a process can have using kernel parameters. How can you modify this value at runtime and make it persistent?
You need to disable IP forwarding on a RHEL system. How do you inspect the current value and change it temporarily and permanently?
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.
