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# extract a circle from the image: translate to the middle of the image and define the radius to cut
convert IMG-TRM-1916-1038.jpg -alpha on -background none \( +clone -channel a -evaluate multiply 0 +channel -fill white -draw "translate 1500,1000 circle 0,0 0,150" \) -compose DstIn -composite -trim out.png

# convert a svg to png with resize the SVG to desired size
convert -background none -density 1536 -resize 4092x4092 roodwit.svg roodwitx4092_1536.png

# rounded rectangle crop
convert <image>.webp +repage -alpha on -background none \( +clone -channel a -evaluate multiply 0 +channel -fill white -draw "translate 225,225 roundrectangle  0,0 571,555 115,115" \) -compose DstIn -composite -trim out.webp

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How Next.js responds to a page request with HTML

We create the next request handler function via app.getRequestHandler(). This returns a standard express handler, so we use it like expressApp.get('*', middlewareA(), middlewareB(), nextApp.getRequestHandler()).

When the handler is invoked:

• Server#handleRequest (next-server/server/lib/next-server.js)
  • Parses URL + query string if not already done
• Server#run
• Searches for matching route

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rest-api-response-format

REST API response format based on some of the best practices

Rest API Popular Endpoint Formats

https://api.example.com/v1/items

https://example.com/api/v1/items

Rest API Success Responses

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# Resize the file system in UI, under VM -> Hardware -> Click on the disk to resize, click "Resize disk" button

# Confirm increase in disk space (1TB in my case)
$ lsblk
NAME                      MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda                         8:0    0    1T  0 disk
├─sda1                      8:1    0    1M  0 part
├─sda2                      8:2    0    1G  0 part /boot
└─sda3                      8:3    0    1T  0 part

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#! /usr/bin/env bash
#
# Run parallel commands and fail if any of them fails.
#

set -eu

pids=()

for x in 1 2 3; do

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/*
In the node.js intro tutorial (http://nodejs.org/), they show a basic tcp 
server, but for some reason omit a client connecting to it.  I added an 
example at the bottom.

Save the following server in example.js:
*/

var net = require('net');

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/**
 *  @fileoverview Pearson correlation score algorithm.
 *  @author matt.west@kojilabs.com (Matt West)
 *  @license Copyright 2013 Matt West.
 *  Licensed under MIT (http://opensource.org/licenses/MIT).
 */


/**
 *  Calculate the person correlation score between two items in a dataset.

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How to see healthcheck Logs ?

Use docker inspect is different in swarm mode and normal mode if you wnat to use it in swarm mode:

• Manager nodes: use this command for services. (but if you want to see healthceck logs of specific container see worker nodes section):

  • docker inspect --format "{{json .Spec.TaskTemplate.ContainerSpec.Healthcheck }}" hinava_dashboard |jq

• Worker nodes: you should use complete name of the container that completed with <tab> key

• docker inspect hinava_filebeat.1.umvobmm9wrjdz1b08y5jibvl2 | grep -B 10 -A 10 "health"

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#!/bin/bash
# Flushing all rules
iptables -F FORWARD
iptables -F INPUT
iptables -F OUTPUT
iptables -X
# Setting default filter policy
iptables -P INPUT DROP
iptables -P OUTPUT DROP
iptables -P FORWARD DROP

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for id in `(cat toDel.txt)`; do echo "aws --profile wasabi s3 --endpoint-url=<endpoint> rm --recursive s3://<bucket>/id_$id/"; done