jasco

Background

The instructions for setting up the Unifi Controller on ARM do not cover ARM64. The documentation states that ARM64 is not supported but hints it can be setup manually. The documentation also states that Java 8 is currently required. The following is therefore clearly in unsupported territory but so far seems to work fine. The internet has numerous references and resources but they weren't all easy to find and the ones I read required some modification for my configuration.

Note for the future: double check versions and source documentation if these instructions are dated. Also these instructions are specifically tailored for Ubuntu. See original references for other platforms.

Last update March 25, 2021

Base configuration

jasco

After upgrading Python, the virtualenv Python symlinks sometimes break. This will manifest as an error when invoking Python within the target virtualenv. This script walks through each virtualenv directory searching for broken links. It will recreate the virtualenv if necessary. It is intended to work with a virtualenvwrapper managed environment in which all virtual environments are centralized under a specific directory.

Assumptions:

• Virtual environments collected under $HOME/.virtualenvs/
• GNU compatible find is called gfind.
• virtualenv command is located at /usr/local/bin/virtualenv

jasco

.vid_bg {
    position: absolute;
    display: block;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
    transition: display .3s;

jasco

# Pachebel Canon for Sonic Pi, played by Flute, Clarinet and Trombone sample based voices
# coded by Robin Newman, March 2015
# modified to work with SonicPi 3.2.2 (min unknown)
# score from www.freegigmusic.com (version for flute oboe and clarinet)
# samples download at http://r.newman.ch/rpi/Pachabel.zip
use_debug false
samples_dir='/home/pi/samples/Pachabel' #adjust location as necessary
# first deal with selecting and setting up the samples

inst0=samples_dir + '/flute_ds5.wav'

jasco

// Most samples used createObjectURL which gave errors suggesting no longer supported by the browser.
// This implementation encodes as a base64 string and saves as an octet-stream.
// Adapted from https://stackoverflow.com/a/38384008 and https://stackoverflow.com/a/11562550
function download(filename, arrayBuffer) {
    const element = document.createElement('a');
    const base64String = btoa(String.fromCharCode(...new Uint8Array(arrayBuffer)));
    element.setAttribute('href', 'data:application/octet-stream;base64,' + base64String);
    element.setAttribute('download', filename);
    element.style.display = 'none';
    document.body.appendChild(element);

jasco

#!/bin/bash
set -e

# References
#  - https://github.com/patjak/bcwc_pcie/wiki/Get-Started#get-started-on-ubuntu
#  - https://gist.github.com/Stono/990ea9f0b3c41606c292f00382d421bf

git clone https://github.com/patjak/bcwc_pcie.git /tmp/bcwc_pcie
cd /tmp/bcwc_pcie
git clone https://github.com/patjak/facetimehd-firmware.git

jasco

# Python3 implementation for CSV parsing of uploaded file
# Test: curl -H "Content-Type: multipart/form-data" -F "file=@mydata.csv" http://localhost:5000/myroute

import csv
import codecs
from flask import (jsonify, request)

# ...

@app.route('/myroute', methods=['POST'])

jasco

Kyocera FS-4020DN Laser Printer Config

Install CUPS

sudo apt update && apt dist-upgrade
sudo apt install cups openprinting-ppds

Add user to printer group

sudo usermod -a -G lpadmin $USER

jasco

#!/usr/bin/perl

use strict;

$| = 1; # Turn off I/O buffering

sub sanitize {
    my $fname = $_[0];
    $fname =~ s#[^-_a-zA-Z0-9./]*##g;
    $fname =~ s#/\.\.+/##g;

jasco

#! /bin/sh

usage_error () {
    echo 'Usage: sh migrator.sh <path to sqlite_to_postgres.py> <path to sqlite db file> <an empty dir to output dump files>'
    echo
    echo 'Example:'
    echo '>sh migrator.sh sqlite_to_postgres.py ~/reviewboard.db /tmp/dumps'
    echo
    echo 'Tested on:'
    echo 'Python 2.7.3'