The most common compressed archive file format in Linux is the tar.gz format. Tar file is an archive file format. Tar.gz is a compressed tar file. Create tar.gz archives The tar command can be used to create tar.gz archives. tar czf new-tar-file-name.tar.gz file-or-folder-to-archive Here is the command explanation: c – create new archive. z -… Read More »
TOR is an anonymity solution that can be used as a proxy over the internet. Project website Install on Ubuntu $ sudo apt-get install tor vidalia During the installation a configuration screen will come up, asking to select those users who would be using tor. Select the appropriate users on that page and continue. After… Read More »
Nikto Nikto is a vulnerability scanner that scans webservers for thousands of vulnerabilities and other known issues. It is very easy to use and does everything itself, without much instructions. It is included by default in pen testing distros like Kali linux. On other oses/platforms you need to install it manually. Can be downloaded from… Read More »
SQLite Database Browser is a freeware, public domain, open source visual tool used to create, design and edit database files compatible with SQLite. It is meant to be used for users and developers that want to create databases, edit and search data using a familiar spreadsheet-like interface, without the need to learn complicated SQL commands…. Read More »
In a previous article we saw how to use sqlmap to exploit vulnerable urls of the form http://www.site.com/section.php?id=59 where the id parameter for example is vulnerable to sql injection. Now we shall try to do the same thing with forms, especially login forms. Forms often submit data via post, so the sytanx for launching the… Read More »
Sqlmap is the most popular tool for carrying out automated sql injections against vulnerable systems. In this tutorial we are going to learn to use it.
Socket function – recv() If you are writing a socket program in python that communicates with some remote machine or server to receive data, then you shall be using the recv() function to receive data on a socket. The recv() can receive only a specified number of bytes into a string buffer. If the incoming… Read More »
The DomDocument class in php can be used to parse html/xml content and build objects that can be queried using standard functions to extract values. The following functions are quite useful: getElementsByTagName – Get all elements under a node that match a tagname getNamedItem – Get element with a particular “name=” attribute. Useful to find… Read More »
Scraper scripts often need to extract all links on a given page. This can be done in a number of ways like regex, domdocument etc. Here is simple code snippet to do this using domdocument. /* Function to get all links on a certain url using the DomDocument */ function get_links($link) { //return array $ret… Read More »
Often numbers are to be written with a proper suffix, like 1st, 2nd, 3rd, 15th, 21st and so on. So here is a quick function to do the same for a number. Technique 1 /* This function will add st, nd, rd, th to the end of numbers */ function ordinal($i) { $l = substr($i,-1);… Read More »
There is a blue patch at the end of this post that mentions the “Last Updated On” date. It is the date when this particular post of last modified or updated on. Since I keep updating many of the old posts from time to time, thought it would be a nice idea to display the… Read More »
In a previous example we learnt about the . In this example we shall build a basic ECHO client and server. The server/client shown here use TCP sockets or SOCK_STREAM. Tcp sockets are connection oriented, means that they have a concept of independent connection on a certain port which one application can use at a… Read More »
Here is a list of most popular puzzle games on Ubuntu Linux Marble Arena 2 Excellent graphics and colorful. This is a game where a marble is to be moved around and points to be collected. Project website http://www.marble-arena.com/ Install on ubuntu 1. Download Linux version from http://www.marble-arena.com/ 2. Install libwebkit1.1-cil from synaptic 3. Extract… Read More »
Socket programming in Java This is a quick guide/tutorial to learning socket programming in Java. The Socket class is documented at http://docs.oracle.com/javase/1.4.2/docs/api/java/net/Socket.html To summarise the basics, sockets are the fundamental “things” behind any kind of network communications done by your computer. For example when you type www.google.com in your web browser, it opens a socket… Read More »
Tutorial on how to code simple network servers and clients using low level Socket api in python.
There are a lot of IDEs for ubuntu for doing php related web development. Lets see a few. Aptana Studio Supports PHP, Ruby, Python and more. Autosuggest dropdowns available, Integrated preview available. Project website http://www.aptana.com/ Install on ubuntu Download from http://www.aptana.com/ Quanta Quanta is the Dreamweaver of Linux. However it is not developed anymore. As… Read More »
Php and tcp/ip sockets This is a quick guide to learning socket programming in php. Socket programming php is very similar to C. Most functions are similar in names, parameters and output. However unlike C, socket programs written in php would run the same way on any os that has php installed. So the code… Read More »
What are callbacks Callback is a piece of code that is passed to some other functions as a parameter, such that it can be executed before or after a certain event or change of state. A common example of callbacks can be seen in javascript when using the jquery ajax function. $.ajax({ url: 'ajax/test.html', success:… Read More »
The idea behind serializing a variable is to create a storable string format of it, such that the same variable can be recreated later when required using the string. 1. serialize and unserialize These are the traditional functions to serialize and unserialize data in PHP. $a = array('a' => 'Apple' ,'b' => 'banana' , 'c'… Read More »
Github Login Github has become a very popular social login on websites related to programming and development. Github itself is a big storehouse of opensource projects and community of developers. Github oAuth documentation can be found at http://developer.github.com/v3/oauth/. Register website with Github oAuth The first thing to do would be to register your website with… Read More »