Recover deleted /etc/passwd File In RHEL

So far we have talked a lot about Linux guys but there is a topic which we haven’t touched much in our discussion and that’s Linux Troubleshooting. So what if we discuss it right now. Not a bad idea guys so let’s get prepared to get your hands dirty in troubleshooting your machine. Today we ‘ll see what to do if your /etc/passwd file is deleted.

For this tutorial I deliberately deleted my /etc/passwd file. Now it’s your time to do so and don’t worry as we’ll recover it quite easily.Once you have deleted this file, you can’t login to any user account on your machine and you will get the following message.

 

Aila problem! But stay cool and restart your machine and boot into single user mode .If you don’t know how to boot into single user mode then you can get help from reading the initial steps of my previous article on hacking root password of  Linux. Once you are there all you need to do is running following command- cp /etc/passwd- /etc/passwd and your problem is solved./etc/passwd- is simply the backup of /etc/passwd and you can use it in case the original file is gone. So it’s done guys BINGOOOO!

Retransmission Steganography Technique

I am quite sure that most of you are familiar with the term Steganography which is the art and science of hiding our data. But today we’ll look into a different kind of Steganography technique called Reverse Steganography which is based on TCP/IP protocol and various similar protocols that utilises retransmission mechanisms.

As we know that during a TCP/IP communication between two machines,the sender sends the data packets to the receiver and the receiver sends the acknowledgment of receiving the packets. If a packet is lost during the communication or the sender doesn’t receive the intended acknowledgment it sends the data packet again. The whole concept of  Retransmission Steganography is based on this approach. Here we don’t acknowledge a successfully received packet in order to intentionally invoke retransmission of that packet. The receiver intentionally signals that a loss has occurred. The sender then retransmits the packet but with some secret data inserted in it. That’s the basic idea behind Retransmission Steganography Technique.

For more detail on this very interesting topic you can check this link and download the complete paper to take a deeper look into this technique.Good bye.

Reset Lost Admin Password In Joomla

Hello everyone. At present I am dealing with a very popular Content Management System called Joomla and believe me it’s very easy to create any kind of Website using this tool. But this post is about a problem faced by me in Joomla. I lost my admin password accidentally but I found a way to recover them which helped me a lot. And that’s what I am going to discuss with you. Following are the steps to follow-

• Open phpMyAdmin. I have installed XAMPP to run Joomla and phpMyAdmin comes with XAMPP.
• Now select the database you have created for your Joomla installation. For your information, Joomla asks for a database to store all the information during the installation.
• Select the table ending with _users. Here I have pbu76_users table.
• Now we’ll edit this table. So click on edit icon.

• Now in the password field select function md5 and then type the password you want to set for the account. You can see this in the screenshot. Now click Go.
• Congrats! We have successfully reset the admin password for Joomla. You can reset password for any user through this way. I hope you like it.

The same procedure is applicable to WordPress also. In case of any problem You can watch my video tutorial.