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nmon:tldr:7f679
The command "nmon -f" is used to start the nmon (short for Nigel's Monitor) tool in data collection mode and save the collected data in a file.
Here's a breakdown of the command:
- "nmon" is the command used to launch the nmon tool.
- "-f" is an option/flag that is used to specify the filename for the collected data.
When you execute the "nmon -f" command, the nmon tool starts running and collects various system performance data such as CPU usage, memory usage, disk I/O, network statistics, etc. It continuously captures this data in intervals and saves it to a file specified by the user. The filename can be provided as an argument after the "-f" option, for example: "nmon -f mydata.nmon" would save the data to a file named "mydata.nmon".
The generated file can later be analyzed or viewed using the nmon tool itself or by using specialized tools to interpret and visualize the performance data.