Sandeep Gupta sangupta

What are CNAME, A records?

The way Internet works is that we first type a domain name in browser: say google.com. The browser then hits the DNS servers for resolution of IP address, so that the browser know which machine to send the request to. The DNS servers return an IP (v4 or v6) against google.com and that IP is then used for all requests going forth. There is a TTL (time to live) associated with every DNS resolution after which the browser is required to re-ask the DNS servers for the new IP again (in case it has changed - this is meant to make sure that in case the machines fail or IPs change - the website can again be reached after the TTL is expired.

Now there are multiple types of DNS records:

1. A Record

Called as Address mapping records - these are used to map a domain/subdomain to a given IP - say,

This is a simple script to run a Java program from Linux shell in the background - so that the process does not terminates when you log out of the shell.

Usage is simple:

Start the process

$ ./java-app-run.sh start

Keybase proof

I hereby claim:

I am sangupta on github.
I am sangupta (https://keybase.io/sangupta) on keybase.
I have a public key whose fingerprint is 9127 C67F 5CEE 90F2 EC65 83D1 CE65 932B DD59 F1A9

To claim this, I am signing this object:

	package main

	import (
	"fmt"
	"io/ioutil"

	v8 "rogchap.com/v8go"
	)

	func main() {

	package main

	import (
	"errors"
	"fmt"
	"io/ioutil"
	"time"

	stdruntime "runtime"

	public class StringJoinBenchmark {

	public static void main(String[] args) {
	final int MAX_ITER = 1000 * 1000;
	final int RUNS = 1;

	long delta = 0;
	long delta2 = 0;

	for(int run = 0; run < RUNS; run++) {

	#!/usr/bin/env python
	import http.server

	class MyHTTPRequestHandler(http.server.SimpleHTTPRequestHandler):
	def end_headers(self):
	self.send_my_headers()
	http.server.SimpleHTTPRequestHandler.end_headers(self)

	def send_my_headers(self):
	self.send_header("Cache-Control", "no-cache, no-store, must-revalidate")

	package com.sangupta.jerry.ds.bitarray;

	import java.io.IOException;

	import com.sangupta.jerry.util.BitUtils;
	import com.sangupta.jerry.util.ByteArrayUtils;

	import net.jcip.annotations.NotThreadSafe;

	@NotThreadSafe

	var webpage = require('webpage');
	var page = webpage.create();
	page.viewportSize = { width: 1600, height: 900 };

	page.open('http://sangupta.com/poetry/best-of-luck.html', function() {
	// execute the selector
	var ev = page.evaluate(function(sel) {
	var ele = document.querySelector(sel);
	if(ele) {
	ele.style.border = "2px solid red";

	import org.slf4j.LoggerFactory;

	import ch.qos.logback.classic.Level;
	import ch.qos.logback.classic.Logger;
	import ch.qos.logback.classic.LoggerContext;
	import ch.qos.logback.classic.encoder.PatternLayoutEncoder;
	import ch.qos.logback.classic.spi.ILoggingEvent;
	import ch.qos.logback.core.FileAppender;

	public class LogbackConfigureExample {