Could you explain what the iotop command is and what it is used for?

The iotop command is a utility in Linux that allows real-time monitoring of disk subsystem usage by processes and threads. It shows which processes are reading or writing data to the disk, and how much input/output resources they are consuming.

Main features of iotop:

• Displaying current read and write speeds on the disk per process.
• Helps identify processes that heavily load the disk.
• Useful for diagnosing performance issues related to disk operations.

Example of running:

iotop

You will see a table with columns PID, user, priority, read/write speed, and process command.

Thus, iotop is a tool for monitoring and analyzing disk activity in the system.