Tuan T. Pham neofob

In this configuration, DHCP will run on the OpenWrt Box, while the TFTP server (the one serves the boot files) runs on a different computer.

1. Add to `/etc/config/dhcp` on OpenWrt Box

config boot linux
        option filename 'pxelinux.0'
        option serveraddress '192.168.?.?'
        option servername '?'

OpenSSL Cheat Sheet 🔐

Install

Install the OpenSSL on Debian based systems

sudo apt-get install openssl

Whilst Asustor's ADM suits most people, it is possible to install ANY intel operating system on the nimbustor4/2 (as5202t/as5304t) as they run fairly generic intel hardware (asmedia sata controller, rtl8125 2.5gbe nic and ite system management chip)

in this gist I'll detail the steps needed to install and configure Debian11

Before proceeding you need to decide where you're going to install Debian.

Most people will choose to install it to a usb3 attached drive - either a usb3 ssd ( samsung t5 or similar ) or a usb3 hdd. This gives the most straightforward install ( just tell Debian to use the entire usb3 drive to install to ) and maximises available space on the NAS HDDs

The other option is to install Debian direct to the NAS hard drives - that means no extra drive hanging off the nas, and you can raid1 mirror the system partition across all drives for added resiliency ( though this is somewhat limited as the EFI boot partition is only on sda - so in the case of sda failing you'd need to boot off i

An Ansible summary

Jon Warbrick, July 2014, V3.2 (for Ansible 1.7)

Configuration file

intro_configuration.html

First one found from of

ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

Convert WAV to MP3, mix down to mono (use 1 audio channel), set bit rate to 64 kbps and sample rate to 22050 Hz:

	# WARNING: These steps seem to not work anymore!

	#!/bin/bash

	# Purge existign CUDA first
	sudo apt --purge remove "cublas" "cuda"
	sudo apt --purge remove "nvidia*"

	# Install CUDA Toolkit 10
	wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/cuda-repo-ubuntu1804_10.0.130-1_amd64.deb

	---
	- hosts: all
	tasks:
	- name: Install prerequisites for Docker repository
	apt:
	name: ['apt-transport-https', 'ca-certificates', 'curl', 'gnupg2', 'software-properties-common']
	update_cache: yes

	- name: Add Docker GPG key
	apt_key: url=https://download.docker.com/linux/ubuntu/gpg

	# Idempotent way to build a /etc/hosts file with Ansible using your Ansible hosts inventory for a source.
	# Will include all hosts the playbook is run on.
	# Inspired from http://xmeblog.blogspot.com/2013/06/ansible-dynamicaly-update-etchosts.html

	- name: "Build hosts file"
	lineinfile: dest=/etc/hosts regexp='.*{{ item }}$' line="{{ hostvars[item]['ansible_default_ipv4']['address'] }} {{item}}" state=present
	when: hostvars[item]['ansible_facts']['default_ipv4'] is defined
	with_items:
	- "{{ groups['all'] }}"

	#!/bin/bash

	# @author Adriano Rosa (http://adrianorosa.com)
	# @date: 2014-05-13 09:43
	#
	# Bash Script to create a new self-signed SSL Certificate
	# At the end of creating a new Certificate this script will output a few lines
	# to be copied and placed into NGINX site conf
	#
	# USAGE: this command will ask for the certificate name and number in days it will expire

	#!/bin/bash

	# Bash shell script for generating self-signed certs. Run this in a folder, as it
	# generates a few files. Large portions of this script were taken from the
	# following artcile:
	#
	# http://usrportage.de/archives/919-Batch-generating-SSL-certificates.html
	#
	# Additional alterations by: Brad Landers
	# Date: 2012-01-27