souravrax

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.

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📘 Essential Linux Server Commands

1. SSH Basics

• Connect to a server:

ssh user@hostname

souravrax

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}

souravrax

Bit Manipulation Cheatsheet (C++)

Operators

Bitwise And --> &

Bitwise Or --> |

Bitwise xor --> ^

souravrax

MongoDB Cheat Sheet

Show All Databases

show dbs

Show Current Database

souravrax

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;
            }

souravrax

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'

souravrax

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 ====

souravrax

#include <stdio.h>

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

souravrax

#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>

souravrax

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