Java and Memory
From a programming point of view, there are essentially six different places to store data on your computer. The fastest storage is the registers since this memory resides inside the…
Java JAR, WAR, and EAR files
.ear, .war, and .jar files are simply files zipped using Java jar tool. Each file is created for a different purpose: .jar files Jar (Java Archive) files contain libraries, resources…
Printing bash parameters
A parameter is an entity that stores value and is available to a program. There are many system variables available to BASH. They could be retrieved easily by prefixing a…
Linux Redirection
Linux processes generally take input from standard input (keyboard), write output to standard out (screen) and may write to standard error if there are any error message which need to…
What is AWS
Amazon defines Amazon Web Services (AWS) as “a secure cloud services platform, offering compute power, database storage, content delivery and other functionality to help businesses scale and grow”. What is…
jQuery Quick Start
Before learning jQuery, you should learn HTML, CSS, JavaScript, and learn how to debug JavaScript. You should also be familiar with JSON. Knowing XML will also be helpful. jQuery is…
Connecting to Linux Instance using SSH on AWS EC2
Go to (http://aws.amazon.com) Sign in Click on EC2 Click on Running Instances Select you pem key. It should match the key pair name. Make sure that the pem key has…
Jupyter Cheat Sheet
Jupyter is an online notebook. You can run python, markup, bash commands, generate visualizations, and much more in the notebook and display the output as well within the same page.…
What is Caching
A cache is a temporary data store that usually contains pre-computed data. The purpose of a cache is to provide the data the next time someone asks for it without…
Character sets, encoding, and collation in MySQL
Character: set of symbols and encodings Encoding: set of values assigned to characters Collation: set of rule for comparing a character set Suppose you have the following characters, that are…