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2298 articles

Blog illustration with latest articles, tutorials, guides, and how-to content across Linux and DevOps topics
databases

How to count rows in a pandas DataFrame [Practical Examples]

In pandas we can count rows Using axes() function, shape() function, index Using info() method, len() function, count() function, value_counts() function

Deepak Prasad7 min read
databases

Pandas set index method explained with examples

Pandas set index is a built-in method in pandas that is used to set the list, Series or dataframe as an index of dataframe.

Bashir Alam9 min read
databases

4 ways to drop columns in pandas DataFrame

Following methods can be used to drop columns in pandas dataframe: Using drop() method, using drop() with columns method, using drop() with loc[] method, using drop() with iloc[] method

Deepak Prasad6 min read
databases

6 ways to select columns from pandas DataFrame

Select column using column name with "." operator or []. Get all column names using columns method or using info() method. Describe the column statistics using describe() method. Select particular value in a column

Deepak Prasad7 min read
databases

5 ways to select multiple columns in a pandas DataFrame

Pandas select multiple columns using column name with [], columns method, loc[] function, iloc[] function, drop() method

Deepak Prasad7 min read
databases

6 ways to add column to existing DataFrame in pandas

In this tutorial we covered following methods which can be used to add column to existing dataframe using [] with None value, [] with Constant value, [] with values, insert() method, assign() method, [] with NaN value

Deepak Prasad6 min read
databases

7 ways to convert pandas DataFrame column to int

In this article we covered multiple examples to convert different types of column to int type in pandas DataFrame

Deepak Prasad6 min read
devops

How to set up Visual Studio Code Remote SSH with GitHub

Step by step instructions to setup visual studio code remote SSH with GitHub

Steve Alila7 min read
programming

Java Arrays.asList Explained

The java Arrays.asList function returns a fixed-size list that contains a java Array. It acts like a list wrapped around an array, it provides a list view to an array.

Azka Iftikhar7 min read
programming

Accessor and Mutator Methods in Java

The knowledge of Java Accessor and Mutator is very useful as it implements encapsulation, which is one of the important feature of Object oriented Programming.

Deepak Prasad7 min read
programming

Java XOR (^) Operator Explained

In this article we will discuss the Java xor (^) operator, this logical operator is used in many conditional statements, it is also used as a bitwise operator to perform tasks with efficient logic

Azka Iftikhar7 min read
security

How to bypass CSRF Protection [5 Different Methods]

In this article, we have learnt about what is an CSRF attack and how we can use CSRF attacks to exploit and also bypass CSRF protection.

Deepak Prasad7 min read
programming

How to Parse CSV Data in NodeJS

In this article, you learned how to parse CSV data in three ways. The first method reads the whole string then splits it into rows and columns.The second method solves this issue by reading the CSV line by line. The last …

Deepak Prasad6 min read
programming

Unary Operators in Java Explained

SUpported Unary operators in java are Unary Plus Operator(+), Unary Minus Operator(-), Logical NOT Operator (!), Increment Operator (++), Decrement Operator (--)

Deepak Prasad6 min read
programming

Logical Operators in Java Explained

Logical operators in Java can be divided into, Logical OR Operator(||), Logical AND Operator(&&), Logical NOT Operator (!)

Deepak Prasad6 min read
programming

Bitwise Operators in Java Explained

Bitwise operators in Java are binary operators that works on bits to perform its operations. Java supports the following Bitwise operators: Bitwise OR Operator(|), Bitwise AND Operator(&), Bitwise XOR Operator (^), …

Deepak Prasad6 min read
programming

Relational Operators in Java Explained

In this tutorial, we covered all relational operators in Java. We learned in detail about the syntax and how we can use this operators with different data types and objects with example.

Deepak Prasad7 min read
programming

Java Operators Explained [Easy Examples]

There are a total of eight java operators. Arithmetic, Rational, Logical, Bitwise, Assignment, Shift, Unary, Ternary operators

Bashir Alam11 min read
devops

Set up GitHub with Visual Studio code

Step by step instructions to setup GitHub with Visual Studio Code. Write your first commit, create branch, pull and push your changes to remote repo using visual studio code

Steve Alila7 min read
programming

Supervised Learning Algorithms Explained [Beginners Guide]

An algorithm is a set of instructions for solving a problem or accomplishing a task. In this tutorial, we will learn about supervised learning algorithms. We

Bashir Alam8 min read
programming

Different Types of Machine Learning Explained [Beginners Guide]

The different types of machine learning are supervised, unsupervised, semi- supervised, reinforcement

Bashir Alam9 min read
security

Analysing Volatility Memory Dump [6 Easy Steps]

In this step by step tutorial we were able to perform a volatility memory analysis to gather information from a victim computer as it appears in our findings. We were able to discover a malware which has camouflaged as a …

Kennedy Muthii7 min read
security

Create phishing campaign with Gophish

Step by step instructions to create a phishing campaign using gophish framework. We have configured sending profile, added the sending profile and templates required to carry out the phishing tests.

Kennedy Muthii5 min read
security

Use Burp Suite Proxy to Intercept Network Traffic [Step-by-Step]

Step by step instructions to setup and configure burp suite proxy to intercept network traffic with examples.

Deepak Prasad9 min read
linux

Getting started with Terraform - Tutorial

Step by step instructions to install terraform on Ubuntu. Deploy AWS EC2 Instance (Infrastructure) using terraform with screenshots and code examples.

Deepak Prasad13 min read
linux

Install GCC on Rocky Linux PROPERLY

step-by-step guide to install GCC on Rocky Linux. We also went further and wrote a C program to add two numbers, and further looked at how GCC carries out compilation

Deepak Prasad5 min read
linux

How to PROPERLY test port connectivity in Linux

Multiple methods and commands to test port connectivity between Linux server and client with examples. Check availability of multiple ports in Linux for firewalls or network issues.

Deepak Prasad6 min read
security

Embed Metasploit Payload on APK on Android File [Step-by-Step]

Step by Step instructions to use metasploit and kali linux to embed a payload on apk file using FatRat.

Kennedy Muthii7 min read
programming

Python set difference() Tutorial [Practical Examples]

The difference between the two sets in Python is equal to the difference between the number of elements in two sets. The Python set difference function returns a set that is the difference between two sets.

Bashir Alam9 min read
linux

Metasploit Tutorial on Kali Linux

Step by step instructions in the tutorial to install and use metasploit framework on kali Linux

Deepak Prasad7 min read