jrelo

#include <stdio.h>

enum TrafficLightState {
    RED,
    GREEN,
    YELLOW
};

void transition(enum TrafficLightState *state) {
    switch (*state) {

jrelo

#!/usr/bin/env python3

import os
import re
import psutil
import tempfile

def get_swap_usage():
    swap_data = []
    total_swap = 0

jrelo

DNS error responses:
sudo tcpdump -vv -i any port 53 and '(udp[10] & 0x80 != 0) and (udp[11] & 0x0F > 0)'
SPecific query types:
sudo tcpdump -vv -i any port 53 and 'udp[12:2] = 0x0100'
Long response times:
sudo tcpdump -vv -i any port 53 and greater 500
Malicious UDP traffic
sudo tcpdump -vv -i any not port 53 and 'udp[12:2] = 0x0100'
Specific domains:
sudo tcpdump -vv -i any port 53 and host example.com

jrelo

filetype plugin indent on
" show existing tab with 4 spaces width
set tabstop=4
" when indenting with '>', use 4 spaces width
set shiftwidth=4
" On pressing tab, insert 4 spaces
set expandtab
" VIM Configuration File
" Description: Optimized for C/C++ development, but useful also for other things.
" Author: Gerhard Gappmeier

jrelo

#include <stdio.h>

/*
Common bitmask operators and logic:

1. AND (&)
Purpose: Clear (set to 0) specific bits or only show bits that are already set.
Example: result = value & mask;
Keeps bits that are 1 in both value and mask.
2. OR (|)

jrelo

exiftool -overwrite_original -EXIF:GPS* -EXIF:DateTimeOriginal= -EXIF:CreateDate= -EXIF:ModifyDate= -IPTC:Byline= -IPTC:BylineTitle= -IPTC:City= -IPTC:Sub-location= -IPTC:Province-State= -IPTC:Country-PrimaryLocationName= -XMP:Creator= -XMP:Description= ./*.jpg
exiftool -all= -tagsfromfile @ -icc_profile -ColorSpace -overwrite_original -ext jpg ./*

jrelo

#include <stdio.h>

int main() {
    int value = 10;     
    int *pointer = &value;  

    // print the address of the variable and the pointer value
    printf("Address of 'value': %p\n", (void *)&value);
    printf("Value of 'pointer': %p\n", (void *)pointer);

jrelo

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

// demonstrate pointer basics
void pointerBasics() {
    int a = 42;
    int *ptr = &a;

    printf("Pointer Basics:\n");

jrelo

#!/bin/bash

get_heap_size() {
    local pid=$1
    local heap_size=0

    # Read the /proc/[pid]/maps file
    while read -r line; do
        if [[ "$line" == *"heap"* ]]; then
            local start_addr=$(echo "$line" | awk '{print $1}' | cut -d'-' -f1)

jrelo

iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -t nat -F
iptables -t mangle -F
iptables -F
iptables -X