Articles by Deepak Prasad
How to install Oracle Virtual Box on Linux (CentOS / RHEL 7)
Step by step Guide to install Oracle Virtual Box on RHEL / CentOS 7 Linux. To install Oracle Virtual Box you need EPEL repo. Oracle Virtual 5.2 is out now
Kubernetes ConfigMaps usage to declare env variables
Kubernetes ConfigMap decouples the application data from the application. It is used to set and define environment variables inside the Pod container. You can also mount the values as files inside the Pod
Getting started with GOLANG | Write your first GO Code
Getting started with go, installing go using package manager, install go-1.19, setup your own go workspace, What is GOPATH and GOROOT, How to integrate visual studio code with GO, Required extensions for GO in visual …
SQL Time Functions Explained [Easy Examples]
SQL Time functions can have different versions in different Database Management Systems like MySQL, ORACLE, and MS SQL Server. NOW(), CURDATE(), CURRENT_TIME(), CURRENT_TIME, CURTIME(), CURRENT_TIMESTAMP(), …
Currying Function in Java Explained
In Java, currying function is the mechanism of breaking down a multi-argument function to form the multiple functions with single arguments such that the output remains same.
How to run NodeJS REPL Inside a Function [Practical Examples]
The NodeJS REPL(Read-Eval-Print-Loop) server provides a programming environment like a Linux shell where a user can evaluate JavaScript expressions and gain access to node modules.
Beginners Tips for Learning Python
But how do you learn Python as a beginner? Well, there are multiple ways you can go about it.
Python pass Vs break Vs continue [1-1 Comparison]
Comparison and differences between pass vs break vs continue statement in python with 1-1 comparision and examples.
How to configure Openstack High Availability with corosync & pacemaker
Step by step guide to configure openstack high availability (HA) using pacemaker and corosync for openstack controller nodes with HAProxy and VIP.
How to create and configure network bridge using nmcli (static & dhcp)
Configure network bridge using nmcli for static and dhcp ip. nmcli connection reload. nmcli onboot. nmcli network manager centos 7. nmcli con add modify
How to enable SSH access & configure network in rescue mode (CentOS/RHEL
Steps to enable SSH access in linux rescue mode and configure network in rescue mode in RHEL/CentOS 7/8 with example transfer sosreport file inst.sshd=1
Fix 'there are no enabled repos' & create local repository in RHEL 7 & 8;
Create local repository using yum and dnf in RHEL 7 and 8 Fix there are no enabled repos Perform yum install without subscription. Create Offline yum repo Linux
How to check security updates list & perform linux patch management RHEL
Perform Linux patch management in RHEL 6/7/8 Linux in LIVE production environment. Identify vulnerabilities list and security updates list then apply patch
Create pyplot figure with matplotlib [In-Depth Tutorial]
matplotlib.pyplot is a sub-library of Python's matplotlib library that provides convenient ways to create static, animated, and interactive visualizations in
How to make circular color gradient in Python?
A color gradient is a way to smoothly transition between two or more colors. A circular gradient is a type of color gradient that transitions in a circular
8 methods to get size of Pandas Series/DataFrame Object
In this tutorial we will cover different examples using multiple methods to get size of dataframe or series object in Pandas. Get column or rows count, entire dataframe size, values count and much more
Effective Cybersecurity Measures for Mac Owners
Use these cybersecurity measures to protect your Mac from malware. Learn the best Mac security methods and software to protect your computer from hackers.
Master SQL Mapping Cardinality: Novice to Expert
Discover the transformative power of SQL Mapping Cardinality in crafting robust and efficient databases. Elevate your database designs to new levels of excellence and precision.
5 easy steps to recover LVM2 partition, PV, VG, LVM metdata in Linux
Steps to recover LVM2 partition accidently deleted or removed. Restore PV (physical volume), restore VG (volume group) and restore LVM metadata in Linux
[5 Solutions] another app is currently holding the yum lock
With yum we get "another app is currently holding the yum lock" or "Existing lock /var/run/yum.pid: another copy is running as pid XXX". To fix this you can..
Found a swap file by the name .XXX.swp
What is .swp file? Why this file is created? How to get rid of Found a swap file by the name warning? Another program may be editing the same file. An edit session for this file crashed
Solved "error: Failed dependencies:" Install/Remove rpm with dependencies Linux
Learn how to install and remove rpm on Linux having multiple dependencies with and without yum. This can be performed online as well as offline depending upon the method selected for installing and removing the rpm. It …
Solved: Failed to restart network.service: Unit network.service not found in RHEL 8
Network scripts are deprecated in Red Hat Enterprise Linux 8 and they are no longer provided by default. In Red Hat Enterprise Linux 8, to run the ifup and the ifdown scripts, NetworkManager must be running. By default …
Solved: lvextend new size given (xx extents) not larger than existing size (xx extents)
The other day while trying to recover my LVM2 volume, I was doing some POC work and while using lvextend I encountered this error "New size given (XXX extents) not larger than existing size (XXX extents)" and it was not …
Step-by-Step Tutorial: Install Docker on CentOS 7 with LVM Thin Provisioning
What is Docker and Docker vs Kubernetes vs Mesos container. Step by Step guide How to install Docker on CentOS 7 Linux. yum install docker centos 7
Beginners guide on Kubernetes volumes with examples
Kubernetes volume lives with a Pod across a container life cycle. After a container is restarted, the new container can see all the files that were written to the volume by the previous container.
How to disconnect idle ssh session or keep idle ssh session active in Linux
How to disconnect idle ssh session in Linux using ClientAliveInterval and ClientAliveCountMax. SSH close connection after sometime. How to close ssh connection
Top 5 Subdomain Enumeration Tools [Web Application Pentest]
In this tutorial article, we have learnt the top 5 tools used for Subdomain Enumeration in Web application Pentesting. All the tools in this post are very essential for a web application pentest and I would advise to at …
Powerful Pattern Matching Techniques in Python Revealed
Discover the transformative power of pattern matching in Python with our comprehensive guide. Dive into advanced techniques, avoid common mistakes, and harness the true potential of your code.
How to HACK WiFi password [100% Working]
We will share step by step instructions to understand the different terminologies and steps involved to hack wifi password using Kali Linux.

