cb-v4s

ssh-keygen -t ed25519 -C "[email protected]" -f ~/.ssh/foo
; then manually insert .pub key on the github account in settings > SSH and GPG keys > SSH keys
ssh-agent bash -c 'ssh-add ~/.ssh/foo; git clone [email protected]:username/repo_name.git'

cb-v4s

const express = require('express')
const { fork } = require('child_process')

const app = express()

app.get('/', (req, res) => {
    const name = req.query.name
    
    const cp = fork('./greetings.js') // heavy task example
    cp.send({ "name", name })

cb-v4s

const limitter = require('express-rate-limit')
const helmet = require('helmet')

...

// middlewares

app.use(
  limitter({
    windowMs: 5000,

cb-v4s

const cluster = require('cluster')
const express = require('express')
// const compression = require('compression')
const os = require('os')


const app = express()
const port = 3000
const ncpus = os.cpus().length

cb-v4s

const mediator = (() => {
    const events = {};

    
    const subscribe = (event, fn) => {
        if (!events[event]){
            events[event] = [];
        }

        events[event].push(fn);

cb-v4s

; setup replica sets
mongod --port 27017 --dbpath ~/mongoc/db0 --replSet Replicante
mongod --port 27027 --dbpath ~/mongoc/db1 --replSet Replicante
mongod --port 27037 --dbpath ~/mongoc/db2 --replSet Replicante

; mongo --port 27017
  rs.initiate()
  rs.add("localhost:27027") ; add second member
  rs.add("localhost:27037") ; add third member

cb-v4s

; crear bot y grupo en telegram
agregar @BotFather en telegram para crear el bot, crea un grupo e invitalo

; consigue chatid desde la api de telegram usando el api token del bot
https://api.telegram.org/bot<TOKEN>/getUpdates

; enviar mensajes usando la api de telegram
https://api.telegram.org/bot<TOKEN>/sendMessage?chat_id=<CHATID>&parse_mode=Markdown&text=<MESSAGE>'

cb-v4s

; find all the files containing `topsykrettz` str in the current folder excluding `node_modules` dir
grep -iRl "topsykrettz" ./ | grep -v node_modules

; find all `mongodb+srv://` occurences in all git logs
git log|grep commit|cut -d' ' -f2|while read commit; do git show $commit; done| grep -i mongodb+srv://

; monitor logs in realtime
tail -f logfile

; copy file content to clipboard

cb-v4s

import time, memory_profiler
    
i_mem = memory_profiler.memory_usage()
start = time.time()

myfunc()

end = time.time()
f_mem = memory_profiler.memory_usage()
elapsed = end - start

cb-v4s

; csgofloat api
  https://api.csgofloat.com/?url=steam://rungame/730/...........................

; query inicial
  https://steamcommunity.com/market/search?appid=730&q=Case Hardened
  https://steamcommunity.com/market/search/render/?query=Case Hardened&start=1&count=100&search_descriptions=0&sort_column=price&sort_dir=desc&appid=730&norender=1
  
; listings por cada resultado del query inicial
  https://steamcommunity.com/market/listings/730/★ Bayonet | Case Hardened (Battle-Scarred)
  https://steamcommunity.com/market/listings/730/★ Bayonet | Case Hardened (Battle-Scarred)/render/?query=&start=0&count=100&country=US&language=english&currency=1