Command(s) of the day Source

March 13, 2009 Markdown source

1---
2title: 'Command(s) of the day'
3date: '2009-03-13'
4published_at: '2009-03-13T11:58:00.009+11:00'
5tags: ['linux', 'performance testing', 'programming', 'sysadmin', 'unix']
6author: 'Gavin Jackson'
7excerpt: 'We were busy yesterday looking into some performance issues with our mail server - I was lucky enough to learn some new Linux commands (these all work on Ubuntu Intrepid, however iotop does not work o...'
8updated_at: '2009-03-13T12:18:32.033+11:00'
9legacy_url: 'http://www.gavinj.net/2009/03/commands-of-day.html'
10---
11
12We were busy yesterday looking into some performance issues with our mail server - I was lucky enough to learn some new Linux commands (these all work on Ubuntu Intrepid, however iotop does not work on RHEL 5.2). iotop - allows you to see which processes are performing the most reads and writes to disk.
13
14[![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjchyb5-YOjePGfNNeJDbwrY2HYvjjjqUQTU0rS5FIO1eL9TLpckBb0cTqL7-xUX3E0Dy4c6G1TA8p8DBETnU9OIomn9hN_9tuxPwy3zzkzido9nrJX8IHMryw5VpFn8Os4HbEGyUYamkk/s400/iotop.png)](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjchyb5-YOjePGfNNeJDbwrY2HYvjjjqUQTU0rS5FIO1eL9TLpckBb0cTqL7-xUX3E0Dy4c6G1TA8p8DBETnU9OIomn9hN_9tuxPwy3zzkzido9nrJX8IHMryw5VpFn8Os4HbEGyUYamkk/s1600-h/iotop.png)
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16iptraf - allows you to see (in real time) who is talking to your box (sort of a lightweight ncurses version of ethereal).
17
18[![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhX__Az6ZHWbYraciAeDKMsKkIeJX6LmvdHV_raF-GjRru-rGr_ZiNG0-wFAAtajKEDWpNuPUorRXnrFyuDF7KwNgyTR34EvUHjJFPppjhOjApl679-ibzprU01HNpE0b0_vBh23RWdBtI/s400/iptraf.png)](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhX__Az6ZHWbYraciAeDKMsKkIeJX6LmvdHV_raF-GjRru-rGr_ZiNG0-wFAAtajKEDWpNuPUorRXnrFyuDF7KwNgyTR34EvUHjJFPppjhOjApl679-ibzprU01HNpE0b0_vBh23RWdBtI/s1600-h/iptraf.png)
19
20dstat - combines iostat, vmstat and ifstat into a sweet package that gives you a good idea of cpu, disk io and network traffic volumes on your hosts (colour coded so you can pick up trends).
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22[![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqcSxjd-wkZ5LI2nlzR5lAV_FTgEX1hGyRkdRASDokz7IYB7c_k5bDN58U6asUrMTA9QuIrZjNV7Ape1qe9CjhtHgWH0YGzfLkSEDoccZBM39avagfGdf2WVbJcWTqJQQRw574XmLKjNg/s400/dstat.png)](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqcSxjd-wkZ5LI2nlzR5lAV_FTgEX1hGyRkdRASDokz7IYB7c_k5bDN58U6asUrMTA9QuIrZjNV7Ape1qe9CjhtHgWH0YGzfLkSEDoccZBM39avagfGdf2WVbJcWTqJQQRw574XmLKjNg/s1600-h/dstat.png)
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---
title: 'Command(s) of the day'
date: '2009-03-13'
published_at: '2009-03-13T11:58:00.009+11:00'
tags: ['linux', 'performance testing', 'programming', 'sysadmin', 'unix']
author: 'Gavin Jackson'
excerpt: 'We were busy yesterday looking into some performance issues with our mail server - I was lucky enough to learn some new Linux commands (these all work on Ubuntu Intrepid, however iotop does not work o...'
updated_at: '2009-03-13T12:18:32.033+11:00'
legacy_url: 'http://www.gavinj.net/2009/03/commands-of-day.html'
---

We were busy yesterday looking into some performance issues with our mail server - I was lucky enough to learn some new Linux commands (these all work on Ubuntu Intrepid, however iotop does not work on RHEL 5.2). iotop - allows you to see which processes are performing the most reads and writes to disk.

[![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjchyb5-YOjePGfNNeJDbwrY2HYvjjjqUQTU0rS5FIO1eL9TLpckBb0cTqL7-xUX3E0Dy4c6G1TA8p8DBETnU9OIomn9hN_9tuxPwy3zzkzido9nrJX8IHMryw5VpFn8Os4HbEGyUYamkk/s400/iotop.png)](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjchyb5-YOjePGfNNeJDbwrY2HYvjjjqUQTU0rS5FIO1eL9TLpckBb0cTqL7-xUX3E0Dy4c6G1TA8p8DBETnU9OIomn9hN_9tuxPwy3zzkzido9nrJX8IHMryw5VpFn8Os4HbEGyUYamkk/s1600-h/iotop.png)

iptraf - allows you to see (in real time) who is talking to your box (sort of a lightweight ncurses version of ethereal).

[![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhX__Az6ZHWbYraciAeDKMsKkIeJX6LmvdHV_raF-GjRru-rGr_ZiNG0-wFAAtajKEDWpNuPUorRXnrFyuDF7KwNgyTR34EvUHjJFPppjhOjApl679-ibzprU01HNpE0b0_vBh23RWdBtI/s400/iptraf.png)](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhX__Az6ZHWbYraciAeDKMsKkIeJX6LmvdHV_raF-GjRru-rGr_ZiNG0-wFAAtajKEDWpNuPUorRXnrFyuDF7KwNgyTR34EvUHjJFPppjhOjApl679-ibzprU01HNpE0b0_vBh23RWdBtI/s1600-h/iptraf.png)

dstat - combines iostat, vmstat and ifstat into a sweet package that gives you a good idea of cpu, disk io and network traffic volumes on your hosts (colour coded so you can pick up trends).

[![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqcSxjd-wkZ5LI2nlzR5lAV_FTgEX1hGyRkdRASDokz7IYB7c_k5bDN58U6asUrMTA9QuIrZjNV7Ape1qe9CjhtHgWH0YGzfLkSEDoccZBM39avagfGdf2WVbJcWTqJQQRw574XmLKjNg/s400/dstat.png)](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqcSxjd-wkZ5LI2nlzR5lAV_FTgEX1hGyRkdRASDokz7IYB7c_k5bDN58U6asUrMTA9QuIrZjNV7Ape1qe9CjhtHgWH0YGzfLkSEDoccZBM39avagfGdf2WVbJcWTqJQQRw574XmLKjNg/s1600-h/dstat.png)