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How to grant AWS user access to a single S3 bucket

How to grant AWS user access to a single S3 bucket

In your IAM dashboard, create a Policy with the following permission: { "Version": "2012-10-17", "Statement": [ { "Sid": "VisualEditor0", "Effect": "Allow", "Action": [ "s3:ListStorageLensConfigurations", "s3:ListAccessPointsForObjectLambda", "s3:GetAccessPoint", "s3:PutAccountPublicAccessBlock&

How to up git SSH access on a new machine

How to up git SSH access on a new machine

Get your private key from your existing machine. In this example the key name is id_rsa cat ~/.ssh/id_rsa Copy the key content, and paste key to new machine on appropriate folder nano id_rsa Change key permissions to 400 chmod 400 id_rsa Start ssh-agent and add

Setting up Flask SQLAlchemy with PostgreSQL

Web Development

Setting up Flask SQLAlchemy with PostgreSQL

Add these packages to your requirements.txt: flask Flask-SQLAlchemy psycopg2-binary Then install them from your terminal pip install -r requirements.txt In main.py: from flask import Flask from flask_sqlalchemy import SQLAlchemy from flask_cors import CORS # database connection parameters DB_HOST = 'localhost' DB_PORT = 5432 DB_

How to setup Basic Auth password authentication for NGINX

How to setup Basic Auth password authentication for NGINX

Create a *.htpasswd file. Eg: touch /etc/nginx/conf.d/nginx.htpasswd Add an user to the file: echo -n 'user1' >> ./nginx/nginx.htpasswd Generate a password to the user using openssl ultility: openssl passwd -apr1 >> ./nginx/nginx.htpasswd The above command will prompt

Setup SSH security on a Linux machine

System Administration

Setup SSH security on a Linux machine

Enable key-based authentication First, enable key-based authentication. It is much more secure than using passwords. Find out how to do so here: Enabling SSH key-based authentication on a Linux machineIt is recommended to use key-based authentication over passwords. Generating a key pair on your local machine We need a public-private

Enabling SSH key-based authentication on a Linux machine

Enabling SSH key-based authentication on a Linux machine

It is recommended to use key-based authentication over passwords. Generating a key pair on your local machine We need a public-private key pair to authenticate with the server. If you have one already, skip this step. If not, enter the following command to generate a key pair. ssh-keygen -t ed25519

System Administration

How to disable sleep when lid closed to turn a Macbook into a server

Disable sleep when lid closed sudo pmset -a disablesleep 1 Incase you want to revert, run this command sudo pmset -a disablesleep 0 Display power settings pmset -g

How to multitask in Linux with Screen

System Administration

How to multitask in Linux with Screen

Screen allows you to have multiple shell sessions, switch between them, as well as terminate the SSH session on a remote machine while keeping long-running tasks running, and return to the session later. Start new screen session screen screen -S session_name Detach from screen ^a + d List screens screen

How to auto-mount hard drives in Ubuntu

How to auto-mount hard drives in Ubuntu

List partitions and note the name and UUID of the partition you want to mount sudo lsblk -o NAME,FSTYPE,UUID Sample output: NAME FSTYPE UUID sda ├─sda1 vfat 7158-C80D ├─sda2 ext4 639f097b-6b4e-4c93-b91e-29e219e5ddce └─sda3 LVM2_member mslNSe-6uVU-aw3U-Ea0a-joV6-LWuk-rBMmiP └─ubuntu--vg-ubuntu--lv ext4 3abbffb9-14b2-4fbf-8dde-3e42229703a0 sdb ├─sdb1 vfat 67E3-17E

How to zip & unzip in Linux

How to zip & unzip in Linux

Install zip and unzip sudo apt-get install zip unzip Zip a folder zip -r file_name.zip /path/to/folder Unzip at current working directory unzip file_name.zip Unzip at specified folder unzip file_name.zip -d /path/to/folder

Testing NGINX config

Testing NGINX config

To test Nginx config: nginx -t To test a specific config file: nginx -t -c /etc/nginx/sites-enabled/example.com

How to create persistent PostgreSQL database with docker-compose

How to create persistent PostgreSQL database with docker-compose

To spin up Postgres on Docker, create docker-compose.yml like so: version: '3.3' services: db: image: postgres:14-alpine # alpine images are lighweight restart: always container_name: db ports: - 5432:5432 # expose default Postgres port for connections environment: # initialize database connection parameters with environment variables. # more info:

How to set up One2many relationships in Flask SQLAlchemy

How to set up One2many relationships in Flask SQLAlchemy

class Class(db.Model): id = db.Column(db.Integer, primary_key=True) students = db.relationship('Students', backref='class') def as_dict(self): result = {col.name: getattr(self, col.name) for col in self.__table__.columns} # add students data to result dict result['students'] = [student.

Installing Plex server on headless Raspberry Pi

System Administration

Installing Plex server on headless Raspberry Pi

# update and upgrade sudo apt-get update sudo apt-get upgrade # add plex repo sudo apt-get install apt-transport-https curl <https://downloads.plex.tv/plex-keys/PlexSign.key> | sudo apt-key add - echo deb <https://downloads.plex.tv/repo/deb> public main | sudo tee /etc/apt/sources.list.d/plexmediaserver.

Create a folder if not exist in Python

Create a folder if not exist in Python

Snippet: import os if not os.path.exists('/path/to/folder'): os.makedirs('/path/to/folder')

How to set up image uploads in Python Flask

How to set up image uploads in Python Flask

Set up a POST route to accept an image field: import uuid import os from flask import request, Response # specify the path where you want to keep the uploaded files IMAGE_UPLOADS = './filestore' @app.route('/upload_img', methods=['POST']) def upload_img(): if request.

Serving a static folder in Python Flask

Serving a static folder in Python Flask

Serving a folder named static: from flask import Flask, send_from_directory app = Flask(__name__) @app.route('/static/<path:path>') def static_assets(path): return send_from_directory('static', path) Serving a built frontend project (eg. Vue, React) In this example, the built project

How to add Vuex to Vue project

How to add Vuex to Vue project

Vue 2 npm install [email protected] --save Create file: src/store/index.js // store/index.js import Vuex from 'vuex' import Vue from 'vue' Vue.use(Vuex) const store = new Vuex.Store({ state: { count: 0 }, mutations: { increment (state) { state.count++ } } }) export default store In

How to create Vue 2 or Vue 3 project using Vite

How to create Vue 2 or Vue 3 project using Vite

create-vue is the recommended CLI to create a Vue project with Vite. https://github.com/vuejs/create-vue Below are the commands that ultilize create-vue to start your Vue project. Vue 3 npm init vue@3 Vue 2 npm init vue@2

Creating React components

Creating React components

Class components import React from 'react' export default class HelloWorld extends React.Component { render() { return <h1>Hello world!</h1>; } } Functional components import React from 'react' export default function HelloWorld(){ return <h1>Hello world!</h1> }

How to setup Redux in a React project

How to setup Redux in a React project

Installing Redux: npm install @reduxjs/toolkit react-redux Create a src/store folder. We will create a numeric counter in our state, Redux calls this a “slice” of the state. To create our slice, create src/store/counter.jsx . Each slice should live in a file similar to this one. // src/

How to setup routing in React with React Router

How to setup routing in React with React Router

First step is to create a new React project. Check out how to do it here: How to create React app with ViteIn your terminal: npm create vite@latest You will be prompted by the setup, choose a project name eg. myApp, and choose React from the list of frameworks.

How to create React app with Vite

How to create React app with Vite

In your terminal: npm create vite@latest You will be prompted by the setup, choose a project name eg. myApp, and choose React from the list of frameworks. Then jump in and start developing: cd myApp npm install # start development server npm run dev

How to wget download multiple links in the background

How to wget download multiple links in the background

First, create a text file (eg links.txt) containing all links you want to download. For example https://dumps.wikimedia.org/enwiki/20210820/enwiki-20210820-geo_tags.sql.gz https://dumps.wikimedia.org/enwiki/20210820/enwiki-20210820-page_props.sql.gz https://dumps.wikimedia.org/enwiki/20210820/enwiki-20210820-page.sql.gz https://dumps.wikimedia.org/

How to setup a OpenVPN server

How to setup a OpenVPN server

Download install script wget <https://git.io/vpn> -O openvpn-install.shwget <https://git.io/vpn> -O openvpn-install.sh Execute the script sudo chmod +x openvpn-install.sh sudo bash openvpn-install.sh At this point you will be prompted to choose either UDP or TCP in protocol options,