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How to Do Reverse DNS Lookup in Linux

Sometimes you may need to do reverse DNS lookup in Linux. Here is how to do reverse DNS lookup in Linux.

You may need to connect to SSH server using pem file in Ubuntu. Here is how to SSH using pem file in Ubuntu terminal.

SCP utility allows you to securely copy files & folders between two locations. Here is the SCP command to copy file from one server to another.

Sometimes you may need to parse YAML file to dict or read YAML file to dict. Here is how to do convert YAML file to dict.

Many times you may need to delete empty lines form text file in Linux. Here is how to remove empty lines in Linux using awk, sed and grep.

Supervisor is a useful utility that allows you to manage processes and tasks in Linux. Here are the steps to install supervisor in Ubuntu.

OpenSSL is a useful utility to generate SSL certificates. Here are the steps to install OpenSSL in Ubuntu.

Sometimes you may need to reset root password in Ubuntu because you may have forgotten it. Here are the steps to reset root password in Ubuntu.

Sometimes you may need to sort contents of CSV file in python. Here is how to sort CSV file in Python.

Sometimes you may need to read binary file line by line or read bytes from binary file. Here is how to read binary file in python.