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Showing posts from January, 2019

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Spring Tool Suite desktop entry to launch as app from Ubuntu favourites

on January 29, 2019

alacarte Eclipse IDE java spring tool suite sts Ubuntu Ubuntu 18.10

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Install Minikube on Ubuntu 18.10

on January 28, 2019

Kubernetes Minikube Ubuntu Ubuntu 18.10

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Install VirtualBox 6.0 on Ubuntu 18.10

on January 28, 2019

Ubuntu Ubuntu 18.10 Virtualbox Virtualbox 6.0

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Conda environments not showing up in Jupyter Notebook

on January 20, 2019

Anaconda Jupyter Notebook Linux Python Ubuntu

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Concatenate Datasets in Python

on January 18, 2019

Data Science Machine Learning Pandas ProTips Python

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Choosing Subset of Columns from a Pandas Dataframe

on January 10, 2019

clean code Data Science Machine Learning Pandas ProTips Python

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Service Orchestration And Service Choreography

on January 01, 2019

micro-services microservices service choreography service orchestration SOA software architecture software development tech

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Essential Vim For CKAD Or CKA Exam

If you are preparing for CKAD or CKA exam and are new to Vim/Vi, this post will help you know everything that is essential to being productive with Vim during your exam. Vim has 3 modes as depicted in picture below: In Command Mode , you do things like navigating your cursor from one point to another in your text file, or delete text or replace text or select text or things like that. When you open Vim, you will be in this mode to begin with. In Insert Mode , you insert text and delete text with [backspace] key :) In Execution Mode , you do things like search text in file, set tab length, set line numbers in editor and stuff like that.

Android Activity's onDestroy() Ain't Your Reliable Friend

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Should I buy refurbished laptop from Amazon?

This post is based on my experience with amazon.in and guess it to be true on all other platforms as well. At least you can check out and verify for these pointers before you make that decision to buy renewed/refurbished laptop on Amazon with your hard earned money. I see this question propping up in several forums and on many different occasions. In the recent past, I had my 5 year old dell laptop that gave up because its motherboard failed. One of the options that I had in my mind was to re-use the HDD and the 16GB DDR4 RAM of that old laptop in the one that I purchase next as secondary. I had come to a conclusion that it is not worth buying a refurbished/renewed laptop at all. Why? For the following reasons, most of which I see as BIG #RedFlags: You got to remember that Amazon provides a platform for 3rd party sellers to sell their products as well. So in your search for refurbished laptops you wouldn’t want to choose some random 3rd party seller who Amazon doesn’t endorse. You...

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Operating System : Ubuntu Web Server : Apache 2.4.48 Objective : Blacklist IP Addresses to block it accessing the web application Steps To Finish Line: Step 1: Enable rewrite apache module by executing ` a2enmod rewrite ` in your bash terminal. Read a2enmod command as " A pache 2 En able Mod ule". Its complementary command to disable an apache module is a2dismod . Putting it here, just in case you want to rollback your changes for whatever reason it be. Step 2: Edit the Apache configuration file for the default website by executing ` vi /etc/apache2/sites-enabled/000-default.conf ` in your bash terminal to add the lines below: so that the configuration file looks like below: Step 3: Now create a file to hold black listed IP Addresses by executing command ` vi /etc/apache2/blacklist ` in your bash terminal and add your IP Addresses to be black listed like below in the file opened for editing in the previous step: Step 4: You may have to change t...

LoadBalancer support with Minikube for Kubernetes

Kubernetes (aka K8s) is an open source system (from Google) for managing containerized applications across multiple hosts; providing basic mechanisms for deployment, maintenance, and scaling of applications. Minikube is a tool that makes it easy to run Kubernetes locally on your laptop/desktop. Minikube runs a single-node K8s cluster inside a VM on your laptop for users looking to try out K8s or develop with it day-to-day.

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