shekk shekkbuilder

Bash scripting cheatsheet

by Lee2sman
Updated 2017-09-18

Bash shebang

#!/usr/bin/env bash for portability, or less good, #!/bin/bash

Commenting

Let's Start (Weekend Notes) ...

Install debootstrap :

$ apt-get install debootstrap

Minimal Debian distribution with debootstrap :

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

Download Audio from YouTube

-i - ignore errors

-c - continue

-t - use video title as file name

--extract-audio - extract audio track

Linux可執行文件ㄉ內容分析工具

NOTE: This is a working copy. This tutorial is unfinished and may contain inaccuracies.

I've written the title of this tutorial in Chinese, as I suspect that its contents may, at first glance, appear similarly incomprehensible to the audience.

However, just as I can sketch for you the following...

可執行文件 = (可 = can) + (執行 = execute) + (文件 = file) = executable (file)

Linux可執行文件ㄉ內容分析工具

NOTE: This is a working copy. This tutorial is unfinished and may contain inaccuracies.

I've written the title of this tutorial in Chinese, as I suspect that its contents may, at first glance, appear similarly incomprehensible to the audience.

However, just as I can sketch for you the following...

可執行文件 = (可 = can) + (執行 = execute) + (文件 = file) = executable (file)

Meltdown fix impact on Redis performances in virtualized environments

Test performed with AOF enabled, fsync policy 1 second, allowing the rewrites to be triggered.

Command lines used:

./redis-benchmark -q -P 32 -n 1000000 -t set,get -r 1000000

	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
	;;;
	;;; Copyright (C), zznop, [email protected]
	;;;
	;;; This software may be modified and distributed under the terms
	;;; of the MIT license. See the LICENSE file for details.
	;;;
	;;; DESCRIPTION
	;;;
	;;; This PoC shellcode is meant to be compiled as a blob and prepended to a ELF

	# ___ ___ __ __
	# / \| __ ______/ (_) /_____/ /
	# / /\| \|/ / / / __ / / __/ __ /
	# / ___ / /_/ / /_/ / / /_/ /_/ /
	# /_/ \|_\__,_/\__,_/_/\__/\__,_/
	#
	# Linux Audit Daemon - Best Practice Configuration
	# /etc/audit/audit.rules
	#
	# Compiled by Florian Roth

	#!/bin/bash

	# this tool will automate firmware extraction and unpacking using FT232R-type adaptors (like BusPirate) and a SOIC clip placed on a chip to dump
	# install the necessary software:
	#$ sudo apt install flashrom binwalk \|\| echo 'git clone?'
	# pump up binwalk with additional packages and libraries
	#$ bash <(curl -s https://raw.githubusercontent.com/devttys0/binwalk/master/deps.sh)
	# place the clip on the chip, connect it to the adaptor, which sould be connected to your PC (with drivers installed) and launch the script:
	# chip => clip => adaptor => PC => script