Convert one m4a file to many mp3s
#!/bin/bash while [ $# -gt 0 ]; do ffmpeg -i "$1" 2> tmp.txt while read -r first _ _ start _ end; do if [[ $first = Chapter ]]; then read # discard line with Metadata: read _ _ chapter ffmpeg -vsync...
How-to guide for beginner-level Linux Kernel patch submissions
Every day I see new Linux Kernel hackers fail at their first patch submission. I'm not an expert, but I've learned how the process works and most importantly I've learned how to avoid irritating...
Console Blackjack in Go
I wrote a console version of Blackjack in Go: https://github.com/gdonald/blackjack
Raspberry Pi LEDs Test
#!/usr/bin/env python3 import time import RPi.GPIO as GPIO GPIO.setmode( GPIO.BCM ) ENABLE = 1; DISABLE = 0 RED = 23; GREEN = 24; BLUE = 25 RGB = [ RED, GREEN, BLUE ] RGB2 = RGB[::-1]
Shell script to automate go lang pkg test coverage
#!/bin/sh PACKAGE=mypkg # set mode go test -coverprofile=coverage.out $PACKAGE go tool cover -func=coverage.out go tool cover -html=coverage.out # count mode go test -covermode=count...
go log function
func log(s ...interface{}) { f, err := os.OpenFile("info.log", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666) if err != nil { fmt.Printf("error opening log file: %v", err) os.Exit(1) } defer f.Close()...
Linux Kernel Powerball Module
I don't play the lottery but I find random number generators and the Linux Kernel interesting so I wrote a simple Linux Kernel module that does a PowerballTM "quick pick". You can download it from...
How to filter out Bash arguments
Ever want to know how to drop an argument (and value), --dir in this case, from a Bash script? Someone from my local LUG asked how to do it and this is what I came up with: Fun ;) #!/usr/bin/env bash...
MongoDB Data Durability
It doesn't seem you can lose data even when you might otherwise expect to ;) I setup a small replica set using mongod --fork --logpath a.log --smallfiles --oplogSize 50 --port 27001 --dbpath data/z1...
My bashrc file
alias ls='ls -ah --color=always' alias ll='ls -lavh --color=always' alias cp='cp -i' alias vi='/usr/bin/emacs' alias ..='cd ..' alias ...='cd ../..'