Psutils and friends

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# psutils and friends
## My Favorite Python tool 
### 14.07.2015, Oz Tiram, Python Users Munich

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#  What is it?

* psutil is a crosss platfrom library for retrieving information on running processes and system utilization 
  * It implements many functionalities offered by command line tools such as: `ps`, `top`, `lsof`, `netstat`, etc ...

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# Why ?

* We still need to know stuff about systems
 * `It works! On my laptop!`<sup>TM</sup>  (Dev's with Windows laptops)
 * Replace tools like `ps`, `netstat` etc. where they are not available
 * Use, don't parse!

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  ## Example 
  ### - With UNIX tools
]

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* Get the number of hosts CPUs:

```shell
 $ cat /proc/cpuinfo 
```
]
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.left-column[
  ## Example 
  ### - With UNIX tools
  ### - Parsing? 
]
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* Get the number of hosts CPUs:

```shell
 $ cat /proc/cpuinfo 
```

* Parse that output with Python?

```python
In [11]: f = open('/proc/cpuinfo')
In [12]: [f for f in f.readlines() if 
          f.startswith('processor')]
Out[12]: 
['processor\t: 0\n',
 ...
 'processor\t: 6\n',
 'processor\t: 7\n']
```
]

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.left-column[
  ## Example 
  ### - With UNIX tools
  ### - Parsing?
  ### - Using!
]
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* Get the number of hosts CPUs:

```shell
 $ cat /proc/cpuinfo 
```

* Parse that output with Python?

```python
>>> import psutil
>>> psutil.cpu_count()
8
>>> psutil.cpu_count(logical=False)
4
```
* <a>It works! On their laptop too!</a>
]

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# Friends

* [PSDash](https://github.com/Jahaja/psdash/)

![Glances](https://github.com/Jahaja/psdash/blob/master/docs/screenshots/process_overview.png?raw=true)

A Flask based real time monitoring for a single or multiple hosts.

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# Friends

* [Glances](https://github.com/nicolargo/glances)

![Glances](https://raw.githubusercontent.com/nicolargo/glances/develop/docs/images/glances-responsive-webdesign.png)
 
   Cureses based real time monitoring with an optional responsive web UI.
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# and more ...

* [Excellent documentaion for psutils](http://pythonhosted.org/psutil/)
 * [ptop](http://github.com/black-perl/ptop/)

![Glances](https://raw.githubusercontent.com/black-perl/ptop/master/docs/ptop2.png)
 * [GRR Rapid Response: remote live forensics for incident response](https://github.com/google/grr)