Sergio maesoser

Telematic engineer born in Madrid. Linux lover. I wrote the IP stack of Tony Stark's MARK-III suit. Now helping make the internet better.

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maesoser / ntop.sh

Last active August 12, 2019 09:13

Net interfaces throughput top written in bash

	#!/usr/bin/env bash

	INTERVAL=5
	NETPATH="/sys/class/net"
	RX1_ARR=()
	TX1_ARR=()
	RX2_ARR=()
	TX2_ARR=()

	while true; do

maesoser / ethercombing.go

Last active January 13, 2023 18:47

	package main

	import (
	"crypto/ecdsa"
	"errors"
	"fmt"
	"github.com/ethereum/go-ethereum/crypto"
	"io/ioutil"
	"math/big"
	"net/http"

maesoser / tmux.conf

Created April 17, 2019 21:38

Tmux configuration

	set -g history-limit 4096

	setw -g monitor-activity on

	# Shift arrow to switch windows
	bind -n S-Left previous-window
	bind -n S-Right next-window

	# THEME
	set -g status-bg black

maesoser / config

Created April 9, 2019 21:17

I3 config files

	set $mod Mod4

	font pango:monospace 9
	#font pango:DejaVu Sans Mono 8

	# Use Mouse+$mod to drag floating windows to their wanted position
	floating_modifier $mod

	# start a terminal
	bindsym $mod+Return exec i3-sensible-terminal

maesoser / iperf-client.sh

Created April 5, 2019 14:15

Iperf scripts designed to perform throughput tests on ovs.

	#!/bin/bash
	# Run multiple parallel instances of iperf client
	# Assumes iperf servers have been started, e.g.
	# iperf -s -p PORT
	# Examples:
	# Run 5 clients for 60 seconds to server 1.1.1.1
	# iperf-multiple-clients 1.1.1.1 5 60 report
	# 5 files will be created, report-1.1.1.1-5001-60.txt, ...
	#
	# Run 7 clients for 20 seconds with UDP

maesoser / pscheck.sh

Created January 4, 2019 08:40

Quick and dirty process monitor, something like Monit

	#!/usr/bin/env bash

	FAIL='\033[0;31m'
	OK='\033[0;32m'
	END='\033[0m' # No Color

	declare -a arr=("rsyslogd" "crond" "noelement")

	## now loop through the above array
	for i in "${arr[@]}"

maesoser / ssh_alias.sh

Last active May 27, 2019 14:29

Now it's recommended to use .ssh/config file instead of the old alias approach, but that does not mean that you've to loss the benefits of the aliases like autocompletion.

	# copy this code to .bashrc

	# This loop generates aliases for the hosts you've configured on ./ssh/config.
	for x in $(grep '^Host' ~/.ssh/config 2>/dev/null \| grep -v '[?]' \| cut -d ' ' -f 2-); do
	alias "$x"="ssh $x"
	done

maesoser / doorwatch.go

Created November 10, 2018 01:09

Door sensor code, both server and client.

	package main

	import (
	"encoding/json"
	"fmt"
	tb "gopkg.in/tucnak/telebot.v2"
	"io/ioutil"
	"log"
	"math/rand"
	"net"

maesoser / far-scp.fish

Created October 16, 2018 13:59

far-ssh and far-scp, when you need to access or copy files through a server acting as a proxy.

	function far-scp
	if count $argv > /dev/null
	echo Connecting through $argv[1]
	echo Source: $argv[2]
	echo Dest: $argv[3]
	scp -oProxyJump=$argv[1] $argv[2] $argv[3]
	else
	echo " usage: far-scp [proxy-addr] [src] [dst]"
	end
	end

maesoser / randomize-mac-addresses

Last active October 9, 2018 08:47

Configure every saved WiFi connection in NetworkManager with a spoofed MAC # address, seeded from the UUID of the connection and the date

	#!/bin/sh

	# /etc/NetworkManager/dispatcher.d/pre-up.d/randomize-mac-addresses

	# Configure every saved WiFi connection in NetworkManager with a spoofed MAC
	# address, seeded from the UUID of the connection and the date plus the hour eg:
	# 'c31bbcc4-d6ad-11e7-9a5a-e7e1491a7e20-2017-11-20-09'

	# This makes your MAC difficult to track across WiFi providers, and
	# for one provider to track across days.

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