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I have spent quite a bit of time figuring out automounts of NFS shares in OS X...

Somewhere along the line, Apple decided allowing mounts directly into /Volumes should not be possible:

/etc/auto_master (see last line):

#
# Automounter master map
#

+auto_master # Use directory service

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Intro

TCL-Expect scripts are an amazingly easy way to script out laborious tasks in the shell when you need to be interactive with the console. Think of them as a "macro" or way to programmaticly step through a process you would run by hand. They are similar to shell scripts but utilize the .tcl extension and a different #! call.

Setup Your Script

The first step, similar to writing a bash script, is to tell the script what it's executing under. For expect we use the following:

#!/usr/bin/expect

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# Assumption: Mac OS X

CHEFDK="/opt/chefdk/embedded"
CHEFDK_USER="$HOME/.chefdk/gem/ruby/2.1.0"
RVM_GEMS="$HOME/.rvm/gems"
RVM_RUBIES="$HOME/.rvm/rubies"
RUBY_NAME="ext-chefdk-ruby"

mkdir -p $RVM_RUBIES/$RUBY_NAME
ln -s $CHEFDK/bin $RVM_RUBIES/$RUBY_NAME

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Introduction

Vocabulary

Examples are decalred using the it method
Assertions are called Expectations
should and should_not are called Modifiers
Matchers are the operators in the assertions (==, >, be_true, etc.)

Install RSpec

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gif-from-tweet

There are so many great GIFs out there and I want to have copies of them. Twitter makes that harder than it should be by converting them to MP4 and not providing access to the source material. To make it easier, I made a bash pipeline that takes a tweet URL and a filename, extracts the MP4 from that tweet and uses ffmpeg to convert back to GIF.

Dependencies

• ffmpeg
  • macOS: brew install ffmpeg
  • Ubuntu/Debian: apt install ffmpeg

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Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

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Ansible variable precedence

Source: http://docs.ansible.com/ansible/latest/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable

From least to most important

• role defaults
• inventory file or script group vars
• inventory group_vars/all
• playbook group_vars/all

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#!/bin/bash
#
# Use the following script using sudo to install multiple golang installations on your debian 
# update-alternatives creates, removes, maintains and displays information about the symbolic links comprising the alternatives system
# Usage : sudo ./full_golang_install.sh
#

if [[ $(id -u) -ne 0 ]] ; then echo "This script should be run using sudo or as the root user" ; exit 1 ; fi

## Configuration and init

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for key in .git-crypt/keys/default/0/* ; do gpg -k $(echo $(basename $key) | sed -e 's/.gpg//') ; done ;

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(?<loglevel>[A-Z])%{NUMBER:logcode} %{TIME} %{NUMBER:threadid} (?<file_source>%{WORD}\.%{WORD}):(?<file_line>%{NUMBER})\] (?<message>.*)