How to know which Linux version you are running

Easy peasy! Run the following command in a Terminal: lsb_release -a You should see something similar to this: pi@raspberrypi:~ $ lsb_release -a No LSB modules are available. Distributor ID: Raspbian Description: Raspbian GNU/Linux 10 (buster) Release: 10 Codename: buster

How to reset Raspbian 10 (Buster) password on Raspberry PI 4

Hey! if you are reading this chances are you forgot the password to your Raspberry PI. Worry not though here is how to reset it on Raspbian 10 Buster using a Raspberry PI 4, I don’t really think the model of Raspberry PI matters but it’s just to give you a better idea of my environment. First start your Raspberry …

How to delete a collection of IDs in POSTMAN

Today I had to delete several objects that I created when testing an API. It was very easy to click the Send button and create a bunch of stuff but now I have to clean the DB. I am using Postman as testing tool and I chose to execute the following code in the Pre-request Script of my test. The …

How to delete a website

If you are like me and you have a new hosting service for your blogs you may know that after moving from to you may want to delete that old website. Here is how to do it. 1- Open your web browser and navigate to the blog you want to delete, in my case 2- Click on …

Base64 URL Safe Encoding / Decoding (RFC-7515)

A few days back I was required to encode some string in base 64 URL safe. After some research I found that there are several variants of base 64. The one implemented in the code below corresponds to RFC-7515. Here is the code: function encodeBase64Url(str) { let s = new Buffer(str).toString(‘base64’); // Regular base64 encoder s = s.replace(‘=’, ”); // …

How to remove documents from a capped collection in MongoDB

You can’t remove one or all documents from a capped collection in MongoDB. BUT! you can drop the collection! Execute the following command: db.getCollection(‘myCollection’).drop() The result for me is: true There you go, quick and easy. Sources

How to count documents of a collection in MongoDB

Today, I had to do this at work. turns out it is very easy. I am using Robomongo 1.0-RC1. I just double click on the collection that I want, in this case knives and I just execute the following query: db.getCollection(‘knives’).count() The result in my case is: 1911 Hope it helps! Sources

How to create a strong password?

There are a few things you can do to create a strong password that will protect your account from being compromised. Use lower case, upper case, numbers, and symbols (check list of valid symbols, this could vary depending on the website / system) Use at least 12 chars to allow a wide key space Don’t use common words or easy-to-guess …

How to generate random bytes in Node.JS

Easy! I discovered this recently and it is interesting to me. Here is a quick example: const crypto = require(‘crypto’); console.log(crypto.randomBytes(1).toString(“hex”)); console.log(crypto.randomBytes(2).toString(“hex”)); console.log(crypto.randomBytes(4).toString(“hex”)); console.log(crypto.randomBytes(8).toString(“hex”)); console.log(crypto.randomBytes(16).toString(“hex”)); console.log(crypto.randomBytes(32).toString(“hex”)); console.log(crypto.randomBytes(64).toString(“hex”)); When you run this code you might see something similar to this: E:\NodeJS>node randomCrypto.js d8 dccd 0709fee2 67d6d7c51cc59f0d af19069e601e47a9141d27d7d828a9d0 f83b7547452099462061734791da57443cc60828de7dcb8f7494eedceb3c889c e2e4a1faaf4190898aaf4fa786e20fe076237854ae4628127cb2eda4bafd3000b42788e347ade94d0c98614a40586b71ded3044879f791adedd6c0d4bb22e9ac The argument passed to the function is the length in bytes, when …

How to activate ES6 in Visual Studio Code

I’ve been looking for this answer for several weeks. Here is how to do it. Go to File > Preferences > Settings (or press Ctrl + ,) Add the following code in the USER SETTINGS tab “jshint.options”: { “esversion”: 6 } I have JSHint installed, if you don’t, you can install it from Visual Studio Code directly. Sources