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Setting Up Basic NodeJs Server with Postgres

sudo apt update
sudo apt upgrade
sudo apt install -y vim tree tmux npm git

Node v20
curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash -
sudo apt install -y nodejs

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import java.io.*;
class Main {
    public static void main(String[] args) {
        String command = "ls";
        try {
            Process process = Runtime.getRuntime().exec(command);
            BufferedReader reader = new BufferedReader(
                    new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {

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conf = {
  "sqs-access-key": "",
  "sqs-secret-key": "",
  "sqs-queue-name": "",
  "sqs-region": "us-east-1",
  "sqs-path": "sqssend"
}

import boto.sqs
conn = boto.sqs.connect_to_region(

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Postgres

Run :

psql -d test -U postgres -W

Most frequently used commands :

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#!/bin/bash

sudo mrt uninstall
sudo mrt uninstall --system
rm -rf ~/.meteorite

sudo rm /usr/local/bin/meteor
rm -rf ~/.meteor

sudo chown -R $(whoami) ~/.npm

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Common Python Errors and handling them

lxml error on mac

Occurance :

    #include "libxml/xpath.h"
             ^
 1 error generated.

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Useful Commands

Create simple server on the current directory u r in

Python

python -m SimpleHTTPServer 8000

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#import necessary libraries
import cv2
import numpy as np

#capture video from the webcam
cap = cv2.VideoCapture(0)

#load the face finder
face_cascade = cv2.CascadeClassifier('/home/sm/Desktop/haarcascade_frontalface_default.xml')

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Clarification: There are two default shell settings.

One is the Unix setting and can be changed with chsh -s.
The other is the Terminal.app-specific setting, and can be changed in Terminal preferences.
You can set your Terminal default shell command to /bin/bash -l in the Terminal app.

-l tells Bash to read startup files. Even if you don't have any user-specific startup files, there are system-wide startup files that will, among other things, set the prompt to the one you're familiar with.

If you've properly set your Unix default shell, you should be able to select Default login shell in Terminal preferences and this will happen automatically.

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find . -maxdepth 1 -name "*.pdf" -print0 | xargs -0 rm