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How to Get Hostname/Domain Name from IP Address in Linux

Sometimes you may need to get hostname/domain name from ip address in Linux. Here are the steps to do it in Linux.

Sometimes you may need to check if string matches regular expression in Python. Here are the steps to do it.

Sometimes you may need to visualize CSV data or plot graph using CSV data. Here are the steps to plot CSV data using matplotlib in Python.

Often you may need to open multiple files in vim editor. Here is how to open multiple files & documents in vim editor.

Swaps space is part of hard disk used to extend RAM memory of system. Sometimes may need to disable swap in Linux. Here is how to do it.

Sometimes you may need to call C Function in Python. Here are the steps to do so.

Sometimes you may need to run MySQL queries from terminal or shell script. Here is how to run MySQL query from command line.

Sometimes you may need to extract database from MySQL dump file. Here are the steps to restore or import single database in MySQL.

Sometimes you may need to extract tables form PDF documents. Here is how to do this using tabula and camelot.

Database administrators often need to backup MongoDB database. Here is a shell script to backup MongoDB database.