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[Unit]
Description=Kafka publish-subscribe messaging system
Requires=zookeeper@kafka.service
After=network.target zookeeper@kafka.service

[Service]
ExecStart=/opt/kafka/bin/kafka-server-start.sh /opt/kafka/config/server.properties

[Install]
WantedBy=multi-user.target

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#!/bin/bash
dev=$1
b=0

while :
do
  a=`cat /proc/net/dev | grep $dev | sed "s/\s\{1,\}/ /g" | cut -d" " -f 11`
  #echo $(($a-$b))
  byte=`expr $a - $b`
  echo `expr $byte \* 8`

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#include <time.h>
#include <stdio.h>

int main(void) {
  printf("time_t: %d\n", sizeof(time_t));
  printf("long: %d\n", sizeof(long));
  printf("timespec: %d\n", sizeof(struct timespec));

  return 0;
}

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import sys
from PIL import Image

im = Image.open(sys.argv[1])

(w, h) = im.size


im.crop((0, 0, w/2, h/2)).save("f/a.png")
im.crop((w/2, 0, w, h/2)).save("f/b.png")

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'use strict';

const readline = require("readline");
const fs = require("fs");
const {spawn} = require("child_process");

//<flag 2byte><timestamp 4><addr 4><mask 4><asn 4>
const packEvent = ev => {
  const buf = Buffer.alloc(18, 0);
  const timestamp = +new Date/1000|0;

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set nocompatible
set number
set autoindent
set shiftwidth=2
set softtabstop=2
set tabstop=2
set expandtab
set list
set listchars=tab:>-,trail:-,extends:>
set noundofile

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brctl addbr yabai

ip link set dev yabai up
ip a a 192.168.100.10/24 dev yabai

ip link add y-to-ns1 type veth peer name ns1-to-y
ip link add y-to-ns2 type veth peer name ns2-to-y

ip netns add ns1
ip netns add ns2

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#!/usr/bin/env python3
import argparse
import logging
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
from scapy.all import *

parser = argparse.ArgumentParser()
parser.add_argument("-r", "--read", required=True, help="filename", default=None)
args = parser.parse_args()

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set nocompatible
set number
set autoindent
set shiftwidth=2
set softtabstop=2
set tabstop=2
set expandtab
set list
set listchars=tab:>-,trail:-,extends:>
set noundofile

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v=2.10.0

version=v$v
file=gobgp_${v}_linux_amd64
service=gobgpd

wget https://github.com/osrg/gobgp/releases/download/${version}/${file}.tar.gz \
  -O /tmp/$file.tar.gz