How To Show Line Numbers In vi / vim Text Editor

To display line numbers along the left side of a window, type any one of the following:

:set number

or

:set nu

To turn off line number again enter the same command:

:set nu! 

If you need number every time you start vi/vim, append following line to your ~/.vimrc file:

set number 

Python - Editor Indentation

It is possible in most editors to set how the TAB and other control characaters are handled.

In vi  :set ts=4  will set up a 4 character tab.  Use echo ":set ts=4" >> ~/.exrc automaticaly set this at startup.

If you prefer to use nano use the following does the same echo "set tabsize 4" >> ~/.nanorc

h**p://www.python.org/dev/peps/pep-0008/

Python - Object Oriented

h**p://www.tutorialspoint.com/python/python_classes_objects.htm

How to Setup Python in a Windows Environment

Useful links on how to install and setup Python to run in a Linux environment:

h**p://blog.sadphaeton.com/2009/01/20/python-development-windows-part-1installing-python.html

h**p://blog.sadphaeton.com/2009/01/20/python-development-windows-part-2-installing-easyinstallcould-be-easier.html

Isolated Python Environments

Below is a link that is very useful in creating a Python environment:

http://iamzed.com/2009/05/07/a-primer-on-virtualenv/

I discovered it on a forum.

Virtual Routers and Switches for Testing

Something I discovered on the web, useful virtual environments:


Cisco Nexus 1000V

Vyatta Live Virtual CD

Vyatta Live CD

Live Web Test Labs

These are some useful live websites I discovered on a hacking forum:


 SPI Dynamics (live) -
 h**p://zero.webappsecurity.com/

 Cenzic (live)
hI**p://crackme.cenzic.com/

Watchfire (live) -
 h**p://demo.testfire.net/

Acunetix (live) -
 h**p://testphp.acunetix.com/
 h**p://testasp.acunetix.com
 h**p://testaspnet.acunetix.com