Proxy with Curl Curl is a very useful library for transferring data over various protocols like http, ftp, https etc. In other words curl can be used to programatically download a web page, or upload file to ftp etc. It also supports using a proxy. This means that curl requests can go through a proxy… Read More »
When working with data import and export for example, file formats like csv and excel are commonly used. Data can be exported to csv format and imported elsewhere. Also data might be entered manually in an excel file and then imported in the database. So there might be a need to convert excel files to… Read More »
Ftp Ftp servers can be used to transfer files to a web server or download files from a web server. Windows 8 has an inbuilt ftp server that can be used to do this. Setting up the inbuilt ftp server of windows 8 requires more steps than installing a 3rd party ftp server. However we… Read More »
Encfs – Encrypted file system We often need to put some confidential data on the hard drive, in which case it becomes essential to have some kind of security mechanism to keep it hidden from unauthorised access of any kind. It could contain credit card numbers, bank statements and list of passwords for various online… Read More »
Tcpdf is a pdf creation library for php that is written in pure php and works without the need of any external library. It also has the feature to generate 2d barcodes like qrcode and pdf417. The 2d barcodes can store much more information than the 2d ones like code39 and ISBN. It is recommended… Read More »
Consider a long running php script that does many tasks and after each task it outputs the status. echo 'Task 1 complete'; …. some delay … echo 'Task 2 complete'; …. more delay and more tasks … Now for such scripts it may be important to load the contents in browser as quickly as they… Read More »
Streaming (Comet) Streaming means to send content part by part at some intervals in the same request. Or in other words, the client is able to process the response part by part, instead of waiting for the whole transfer to complete. In the context of http and web applications it is more specifically called Comet…. Read More »
Server sent events When running a long serverside task inside a web application it becomes very useful, if not necessary to report the progress of that task in realtime to the clientside, that is the browser. Earlier there was no easy way to do this and hacks had to be constructed to achieve such a… Read More »
Password Protected Zip Files Often times we need to create secure zip files that cannot be opened by anyone other than the intended recipient. The simplest way to do this is by creating an encrypted zip file. On Linux systems the popular archive format “tar” does not support encryption natively. But “zip” format does support… Read More »
Crond is the cron daemon that is responsible for running the cron tasks of all users on a linux system. Most hosting providers provide it on the servers they sell. Cpanel is a popular server management application that can manage various such daemons and services and restart them if they shut down for some reason…. Read More »
After hacking a web application or server to such an extent that you can upload files to it, the next thing to try is get a proper shell on the system. The most common approach is to create reverse shells. In this approach first a listener program is run on the hacker’s machine and then… Read More »
The nmap scripting engine allows users to write scripts in Lua to automate the process of scanning. This tutorial shows how to use the existing scripts that come with nmap for information gathering.
Metasploit can be used to make simple yet powerful trojans for windows that can allow a hacker complete access and control over the target system. In this article we shall see how to use metasploit to make a trojan and hack a windows system using it. You shall need a system running metasploit and another… Read More »
The following error came up when I tried to run Adobe Acrobat Reader on ubuntu 12.10 error while loading shared libraries: libgtk-x11-2.0.so.0: cannot open shared object file: No such file or directory To fix this, simple install the package ia32-libs-gtk $ sudo apt-get install ia32-libs-gtk Now run the application again and the error should go… Read More »
Learn to use the aptitude, dpkg and apt-get commands to install,update and remove packages from the command line on ubuntu and debian based systems.
Unique identifier for each storage device UUID is the “universally unique identifier” that is assigned to devices on a linux system for the purpose of identification. For example if your hard disk has 3 partitions then each partition is a device and has a uuid. Similarly cd/dvd, usb drives etc all are assigned a uuid…. Read More »
Here is a quick trick that can speed up the main/navigation menus and menus in file manager like pcmanfm inside the lxde desktop. This trick is a setting for the gtk library. 1. Open the file named .gtkrc-2.0 in the home directory. If the file does not exist, then create one. 2. Put in the… Read More »
The lxde desktop is a lightweight desktop for linux systems. Similar to xfce but requires lesser resources than the heavier gnome and kde desktops. Many linux distros have a lxde spin as well for those who prefer the lxde desktops. For example Lubuntu is the lxde variant of ubuntu. Fedora too has a lxde version…. Read More »
Backtrack 5 rc3 is at the present the latest release of backtrack linux and is based on ubuntu. Virtualbox supports such oses very well and installation of guest additions is also very swift and smooth. So now we are going to install the backtrack distro inside Virtualbox. Get the latest virtualbox for your system (windows,… Read More »
Opensuse 12.2 by default has the virtualbox guest additions inbuilt. But if you want to reinstall then follow the steps. First install the C compiler and make utilities required to compile the guest additions. sudo zypper in gcc make Now install the kernel development packages for the current distro version Find the kernel type ~>… Read More »