Sourav Rakshit souravrax

MongoDB Cheat Sheet

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Bit Manipulation Cheatsheet (C++)

Operators

Bitwise And --> &

Bitwise Or --> |

Bitwise xor --> ^

Structured list of essential Linux commands you need when working on servers remotely via SSH. This isn't every command under the sun, but a practical toolbox covering systemd, networking, users, permissions, files, processes, and SSH.

📘 Essential Linux Server Commands

1. SSH Basics

Connect to a server:

ssh user@hostname

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	#include <stdio.h>
	#include <time.h>
	#include <stdlib.h>
	#include <conio.h>
	#include <time.h>
	#include <ctype.h>
	#include <time.h>
	#include <windows.h>
	#include <process.h>

	#include <stdio.h>

	int main(void) {
	// Red text and blue background
	puts("\x1b[31m\x1b[44mHello, World"); // Reset colors to defaults
	printf("\x1b[0m");
	}

	set nocompatible "be iMproved, required
	set exrc

	set encoding=UTF-8

	set rtp+=$HOME/.vim/bundle/Vundle.vim

	call vundle#begin('$HOME/.vim/bundle/')

	" ==== PLUGINS ====

	1. Make a directory for the django project
	2. Install 'pipenv' in the system environment if not already
	3. Create a virtual environment by running 'pipenv shell' (the location of the venv defaults to '~/user/.virtualenv/', to make it live inside the current directory, make an empty folder named '.venv', pipenv automatically detects that folder and creates the virtual environment inside that folder)
	4. Now install django by running 'pipenv install django' (installs the latest version)
	5. Start the project by running 'django-admin startproject $NAME_OF_THE_PROJECT'
	6. To start the live server cd into the project and run 'python manage.py runserver port(optional)'
	7. To make a new app inside that project run 'python manage.py startapp $NAME_OF_THE_APP'

	const int N = 9;

	class Solution {

	bool canPlace(vector<vector<char>>& board, int i, int j, char x) {
	// row check
	for(int c = 0; c<9; c++) {
	if(board[i][c] == x) {
	return false;
	}

	current_date = %A_DD%

	Run, msedge https://adventofcode.com/2022/day/%current_date%/input
	Run, cmd.exe,,,myCMD
	WinWaitActive, ahk_pid %myCMD%
	Send cd %HOME%/cp/aoc/2022 && mkdir day%current_date% && cd day%current_date%
	Send {Enter}

	Send touch input.txt sample.txt && code .
	Send {Enter}