Note: The Operating System in use is Ubuntu Linux (11.04) My Gem Environment – $ gem env RubyGems Environment: – RUBYGEMS VERSION: 1.8.11 – RUBY VERSION: 1.9.2 (2010-08-18 patchlevel 0) [x86_64-linux] – INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/1.9.1 – RUBY EXECUTABLE: /usr/local/bin/ruby – EXECUTABLE DIRECTORY: /usr/local/bin – RUBYGEMS PLATFORMS: – ruby – x86_64-linux – GEM PATHS: – /usr/local/lib/ruby/gems/1.9.1… Read More »
Hping Hping is a command line tool that can be used to generate packets on the network for scanning and diagnosis purpose. Its similar to the ping command that generates and sends icmp packets to a remote host to check if its alive or not. But hping has more features. Besides icmp, it can also… Read More »
There are many instances when you want to take the screenshot of a webpage from within a php script or the command line. On ubuntu there are several ways to do it and most of them produce a webkit , gecko or khtml rendered screenshot image. Some of the methods require X session to open… Read More »
VNC stands for Virtual Network Computing or in simple terms its ‘Remote Desktop’. It allows a system to access the desktop of another system. Now lets see how vnc can be done on ubuntu. Install Packages $ sudo apt-get install vnc4server xvnc4viewer 1. vnc4server – This is the vnc server application. It is run on… Read More »
In this tutorial, I am going to show you a simple way to write a Hit Counter script in PHP to save and display the number of visits to your website. We will basically store and increment the hits in a file, that can be used to display the total hit count as well. The… Read More »
A port scanner is a program designed to probe a server or host for open ports. Looking at open ports, one can tell what services might be running on the remote server. We earlier made a TCP Connect port scanner in C here – https://www.binarytides.com/tcp-connect-port-scanner-code-c-winsock/ and here – https://www.binarytides.com/tcp-connect-port-scanner-c-code-linux-sockets/ Now we shall try making the… Read More »
Here is a list of port scanners that work on Ubuntu/Linux. 1. Angry IP Scanner Download and Install from http://www.angryip.org/ Fast and easy to use network scanner and port scanner. To scan ports got to Tools > Preferences > Ports > Port Selection Enter the ports you want to scan Start the scan. 4. Nmap… Read More »
The getimagesize function of php provides lot of information about an image file , including its type. The type can be used to check if the file is a valid image file or not. To check if a file is an image or not, use the function function is_image($path) { $a = getimagesize($path); $image_type =… Read More »
In many php applications there are multiple tasks that need to be run via cron at different times. In a typical application you may be doing the following tasks via cronjobs : 1. Backup database. 2. Send out email to subscribers. 3. Clear temporary files. 4. Fetch xml feeds from some source and store them… Read More »
desktop:~$ php -a Interactive shell php > echo time(); 1319362432 php > Above is an example of a given timestamp. And a cron schedule can look like this 0 5 * * * – which means run everyday at 5 hours and 0 minutes. Now in a php application you may need to test if… Read More »