iotop

Introduction

This cheat sheet provides a quick reference for some common iotop commands and concepts. iotop is a command-line utility used to monitor and display I/O (Input/Output) usage by processes on Unix-like operating systems.

`iotop` Concepts

I/O Monitoring

iotop displays real-time I/O usage by processes, including read and write operations, as well as the amount of data transferred.

Start iotop:
```
iotop
```

Process Details

iotop provides details about processes, such as their process ID (PID), user, and I/O usage.

Display process details:
```
iotop -o
```

Sorting

iotop allows you to sort processes by various criteria, including I/O rate and accumulated I/O.

Sort by I/O rate (default):
```
iotop
```
Sort by accumulated I/O:
```
iotop -a
```

Batch Mode

iotop can operate in batch mode, useful for saving data to a file.

Run iotop in batch mode and save the output to a file:
```
iotop -b -o -n 5 > iotop_output.txt
```

`iotop` Command-Line

Start iotop:
```
iotop
```
Display process details:
```
iotop -o
```
Sort processes by accumulated I/O:
```
iotop -a
```
Run iotop in batch mode and save the output to a file:
```
iotop -b -o -n 5 > iotop_output.txt
```

Conclusion

This cheat sheet covers some common iotop commands and concepts. iotop is a valuable tool for monitoring I/O usage by processes in real-time, helping identify disk-intensive processes and potential performance bottlenecks; refer to the official iotop documentation for more in-depth information and advanced usage.

iotop

Introduction​

iotop Concepts​

I/O Monitoring​

Process Details​

Sorting​

Batch Mode​

iotop Command-Line​

Conclusion​