by Ramesh Natarajan on May 15, 2012
Q: How do I encrypt my bash shell script on Linux environment? The shell script contains password, and I don’t want others who have execute access to view the shell script and get the password. Is there a way to encrypt my shell script?
(more…)
by Himanshu Arora on May 11, 2012
Fast data communication has become the basic need of todays world and Internet has become the heart of the communication ecosystem. Devices like mobile phones (whose purpose is voice communication) are having Internet connectivity and PCs, laptops etc (which are mostly used for web surfing) are now also being used for voice communication. So we see that technologies are converging or intermixing to provide fast and easy communication.
(more…)
by Lakshmanan Ganapathy on May 10, 2012
Ettercap stands for Ethernet Capture.
Ettercap is a comprehensive suite for man in the middle attacks.
It features sniffing of live connections, content filtering on the fly and many other interesting tricks. It supports active and passive dissection of many protocols and includes many features for network and host analysis.
(more…)
by Himanshu Arora on May 9, 2012
There are scenarios in which one would like to know the route which a connection follows. By route here we mean the IP addresses of all the forwarding entities (like routers in between).
Although there is no guarantee that the route will remain same for all the packets of a connection but usually it is same. This route related information can be very handy while debugging network related issues.
(more…)
by Ramesh Natarajan on May 7, 2012

If you try to follow the how to install Apache with SSL article that we discussed a while back, you’ll face an issue during “make” because of version compatibility between Apache 2.4.4 and APR utilities (Apache Portable Runtime Library) that comes with CentOS 6.
We’ve explained in this article how to solve that issue to get the latest Apache working on CentOS or RedHat.
(more…)
by Himanshu Arora on May 4, 2012
In the previous article of this series, we discussed about the basic principles of IP routing and the steps involved in IP routing.
In this article we will look a bit closely at some of the other aspects related to IP routing.
(more…)
by Himanshu Arora on May 3, 2012
In the Linux threads series, we discussed on the ways in which a thread can terminate and how the return status is passed on from the terminating thread to its parent thread. In this article we will throw some light on an important aspect known as thread synchronization.
(more…)
by Ramesh Natarajan on May 2, 2012
As you already know, it is very critical to take backup of your system on an on-going basis.
If you are using Ubuntu desktop, depending on your requirement, you can use any one of the following software to perform backup. Play around with these and pick the one that satisfies your need.
(more…)