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Postgress Important commands

Restart auto-increment counter

ALTER SEQUENCE project_detail_question_category_id_seq RESTART WITH 1

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Spotify Control Commands for terminal

General syntax

dbus-send --print-reply --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.{{Command}}

Play

dbus-send --print-reply --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.Play

Pause

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<?php

function readable_number($number, $discharge = 0, $fractional = null, $fractional_count = 1)
{
  $int_number = intval($number);
  
  if($int_number > 999) 
  {
    $num = substr($int_number, 0, strlen($int_number) - 3);
    $discharge++;

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error: key "CEB167EFB5722BD6" could not be looked up remotely error: required key missing from keyring error: failed to commit transaction (unexpected error)

$ sudo pacman-key --lsign-key CEB167EFB5722BD6

if this gives error ERROR: CEB167EFB5722BD6 could not be locally signed.

$ sudo pacman-key --refresh-keys

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Anaconda Commands

1. Managing Environments

Refer official docs [https://conda.io/docs/user-guide/tasks/manage-environments.html]

Simplified: https://medium.freecodecamp.org/why-you-need-python-environments-and-how-to-manage-them-with-conda-85f155f4353c

Help

conda create --help

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1. To prints detailed information about all PCI buses and devices in the system

$ lspci

to get specific pci buses info

$ lspci | grep -i nvidia

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Advanced configuration for nginx

There are some small changes you can make to make your website faster, and a little more secure.

Security enhancements

The original configuration will keep you safe, but it is always good to see what else can be done.

Giving less information to attackers

By default, the nginx.conf will return "403 Forbidden" errors for system files that are not supposed to be accessed directly. However, there's a good alternative, like so:

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function cryptoUniqid(string $prefix = '', bool $prng = false): string
{
     static $nonce = null;
     if($prng || is_null($nonce)) {
         $nonce = random_bytes(16);
     } else {
         sodium_increment($nonce);
     }
     $m = microtime(true);
     $return = sprintf("%8x%05x", floor($m), ($m-floor($m))*1000000);

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<?php
//simple class to convert number to words in php based on http://www.karlrixon.co.uk/writing/convert-numbers-to-words-with-php/
if ( !class_exists('NumbersToWords') ){
  /**
  * NumbersToWords
  */
  class NumbersToWords{
    
    public static $hyphen      = '-';
    public static $conjunction = ' and ';

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export const kebabToPascalCase = str.replace(/(?:^\w|[A-Z]|\b\w)/g, (letter, index) => letter.toUpperCase()).replace(/[^\w]+/g, "");
// eg: some-string => SomeString

export const toNepaliNumber = n => (n + '').replace(/\d/g, i => '०१२३४५६७८९'[i])

export const numberToWord = amount => {
  const a = ["", "One ", "Two ", "Three ", "Four ", "Five ", "Six ", "Seven ", "Eight ", "Nine ", "Ten ", "Eleven ", "Twelve ", "Thirteen ", "Fourteen ", "Fifteen ", "Sixteen ", "Seventeen ", "Eighteen ", "Nineteen"];
  const b = ["", "Ten", "Twenty", "Thirty", "Forty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"];
  
  amount = (amount.toFixed(2)).toString().split(".");