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Steven de Salas sdesalas

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@sdesalas
sdesalas / echo.js
Created August 3, 2022 09:30 — forked from bszwej/echo.js
Pure Node.js echo server, that logs all incoming http requests (method, path, headers, body).
const http = require('http');
const server = http.createServer();
server.on('request', (request, response) => {
let body = [];
request.on('data', (chunk) => {
body.push(chunk);
}).on('end', () => {
body = Buffer.concat(body).toString();
@sdesalas
sdesalas / various.sh
Created May 22, 2022 17:35
Db backup scripts
for DB in $(mysql -u root -p<password> -h <IP of DB> -e 'show databases' -s --skip-column-names); do
mysqldump -u root -p<password> -h<IP of DB> $DB > "$DB.sql";
@sdesalas
sdesalas / ddns.sh
Created May 7, 2022 21:11
#!/bin/sh
# Roll your own DDNS
# Shell script to update namecheap.com dynamic dns
# for a domain to your external IP address
HOSTNAME=$MYSUBDOMAIN
DOMAIN=$MYDOMAIN
PASSWORD=$MYSECRETPASSWORD
@sdesalas
sdesalas / test_bin
Last active March 22, 2022 18:42
ESM in extensionless executable files (`import` statement inside dependency chain)
#!/usr/bin/env node
/**
* This is a POC of https://github.com/nodejs/modules/issues/152#issuecomment-1068515887
*
* The requires statement below should fail with an error while
* using an ESM import buried inside the module dependency chain:
* import crypto from 'crypto';
* ^^^^^^
* SyntaxError: Cannot use import statement outside a module
@sdesalas
sdesalas / createWallet.js
Created March 5, 2022 16:03 — forked from PraneshASP/createWallet.js
Create a bitcoin wallet with this simple script.
//Import dependencies
const bip32 = require('bip32')
const bip39 = require('bip39')
const bitcoin = require('bitcoinjs-lib')
//Define the network
const network = bitcoin.networks.bitcoin //use networks.testnet for testnet
// Derivation path
const path = `m/49'/0'/0'/0` // Use m/49'/1'/0'/0 for testnet
@sdesalas
sdesalas / docker-cockpit-portainer.sh
Last active May 4, 2025 23:09
Docker + Portainer + Cockpit
#1 Openssh server
sudo apt install -y openssh-server
sudo systemctl enable ssh
sudo systemctl start ssh
sudo ufw enable
sudo ufw allow ssh
#2 Docker (https://docs.docker.com/engine/install/ubuntu/)
sudo apt-get install -y apt-transport-https ca-certificates curl gnupg-agent software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
@sdesalas
sdesalas / safeintegers.js
Created October 22, 2021 11:42
// @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER
// @see https://en.wikipedia.org/wiki/Double-precision_floating-point_format
console.log(Number.MAX_SAFE_INTEGER);
const z = 4153000000000000000 + 99;
console.log(z);
console.log('Thats why.');
//
@sdesalas
sdesalas / util.promisify.js
Last active November 23, 2022 18:20
const util = require('util');
setTimeout(async () => {
db.getData = util.promisify(db.getData);
db.processData = util.promisify(db.processData);
db.saveData = util.promisify(db.saveData);
try {
@sdesalas
sdesalas / docker.alpine.install.awscliv2.sh
Last active March 26, 2024 14:50
Install AWSCLIv2 in `docker:latest` alpine image for running docker-dn-docker depoyments in Gitlab
# `docker:latest` image uses base alpine linux
# This script allows installing awscliv2 which requires
# gcc buildtools (instead of default `musl` in alpine)
# https://stackoverflow.com/questions/60298619/awscli-version-2-on-alpine-linux
GLIBC_VER=2.31-r0
# install glibc compatibility for alpine
apk --no-cache add \
binutils \
jq \
@sdesalas
sdesalas / gitlab-runner-install.sh
Last active January 24, 2022 17:36
Gitlab Runner in Ubuntu 18/20 with TLS enabled (for docker:dind)
# 0. SET YOUR GROUP REGISTRATION TOKEN
# @see https://gitlab.com/groups/mygroup/-/settings/ci_cd#runners-settings
export GITLAB_REGISTRATION_TOKEN=abc123def456
# 1. INSTALL GITLAB RUNNER
# @see https://docs.gitlab.com/runner/install/linux-repository.html
curl -L https://packages.gitlab.com/install/repositories/runner/gitlab-runner/script.deb.sh | sudo bash
export GITLAB_RUNNER_DISABLE_SKEL=true; sudo -E apt-get install gitlab-runner