prabaprakash

Docker Commands :
$ sudo tail -f $(docker inspect --format='{{.LogPath}}' $(docker ps -a | grep "chrome" |awk '{print $1}')) > result.txt

$ docker images --format '{{.Size}}\t{{.Repository}}\t{{.Tag}}\t{{.ID}}' | sed 's/ //' | sort -h -r
$ docker rmi $(docker images --format '{{.ID}}'  | sort -h -r)
$ docker rm -f $(docker ps -a | grep -E "hub|chrome" |awk '{print $1}')
$ docker rm -f $(docker ps -a | grep "chrome" |awk '{print $1}')
$ docker rm -f $(docker ps | grep -E "chrome|hub" |awk '{print $1}')

$ docker run -d -p 4444:4444 --name selenium-hub selenium/hub:3.8.1

prabaprakash

var express = require('express');
var router = express.Router();
var multer  = require('multer')
var upload = multer({ dest: 'uploads/' })
router.post('/Upload', upload.single('file'), function (req, res, next) {
  console.log(req.body); //form fields
	console.log(req.file); //form files
	/* example output:
            { fieldname: 'upl',
              originalname: 'grumpy.png',

prabaprakash

1. Locust
performance.py
from locust import HttpLocust, TaskSet, task

class UserBehavior(TaskSet):
    def on_start(self):
        """ on_start is called when a Locust start before any task is scheduled """
        #self.login()
    @task(1)
    def three(self):

prabaprakash

var jsdiff = require('diff');
var _ = require('lodash');

var b = "I'm from Chennai.\n" +
    "Live in: mylapore\n" +
    "post graduates: [Degree]";
var a = "I'm from Chennai.\n" +
    "Live in: [Location]\n" +
    "post graduates: [Degrees]";

prabaprakash

import { describe, it } from 'mocha';
import { expect } from 'chai';
import _ from 'lodash';
var path = require('path'),
  fs = require('fs');

function executeFunctionAtRuntime(func)
{
  var args = [];
  for (var i = 1; i < func.length; i++)

prabaprakash

Linux Tools:
chroot, namespace, cgroups, unshare, cgcreate, nsenter
Blogs:
https://jvns.ca/blog/2016/10/10/what-even-is-a-container/

prabaprakash

1. Installing 
https://www.digitalocean.com/community/tutorials/how-to-install-puppet-4-on-ubuntu-16-04
2. cd /etc/puppetlabs/code/environments/production/manifests
2.1 site.pp
file {'/tmp/it_works.txt':                        # resource type file and filename
  ensure  => present,                             # make sure it exists
  mode    => '0644',                              # file permissions
  content => "It works on ${ipaddress_eth0}!\n",  # Print the eth0 IP fact
}
2.2 pack.pp

prabaprakash

https://codesandbox.io/s/lxxj11qqym
import React from "react";
import PropTypes from "prop-types";
import { render } from "react-dom";

const reducers = (state = {}, action) => {
  switch (action.type) {
    case "initiate":
      return Object.assign({ number: 0 }, state);
    case "add":

prabaprakash

iftop
tcpdump
SolarWinds Deep Packet Inspection and Analysis Tool (FREE TRIAL)
Paessler Packet Capture Tool (FREE TRIAL)
tcpdump
Windump
Wireshark
tshark
Network Miner
Fiddler

prabaprakash

1. defineProperty
  const object1 = {};

  Object.defineProperty(object1, 'property1', {
    value: 42,
    writable: false
  });

  object1.property1 = 77;
  // throws an error in strict mode