pawel-t

progrium/bashstyle

Bash is the JavaScript of systems programming. Although in some cases it's better to use a systems language like C or Go, Bash is an ideal systems language for smaller POSIX-oriented or command line tasks. Here's three quick reasons why:

It's everywhere. Like JavaScript for the web, Bash is already there ready for systems programming.
It's neutral. Unlike Ruby, Python, JavaScript, or PHP, Bash offends equally across all communities. ;)
It's made to be glue. Write complex parts in C or Go (or whatever!), and glue them together with Bash.

This document is how I write Bash and how I'd like collaborators to write Bash with me in my open source projects. It's based on a lot of experience and time collecting best practices. Most of them come from these two articles, but here integrated, slightly modified, and focusing on the most bang for buck items. Plus some ne

Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

Install Virtualbox && Vagrant for MacOSX

Vagrant uses Virtualbox to manage the virtual dependencies. You can directly download virtualbox and install or use homebrew for it.

$ brew cask install virtualbox

Now install Vagrant either from the website or use homebrew for installing it.

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

Kubectl output options

Let's look at some basic kubectl output options.

Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).

We can start with:

kubectl get no

	import hudson.model.*
	import hudson.maven.*
	import hudson.tasks.*
	import hudson.scm.*

	def match_url = "http://svn.mycorp.com/svn/devops"

	for(item in Hudson.instance.items) {
	hasClaim = false;
	if (item.scm instanceof SubversionSCM)

	configure {
	it / 'publishers' / 'jenkins.plugins.slack.SlackNotifier'(plugin: "[email protected]") {
	teamDomain('myteam')
	authToken('mytoken')
	buildServerUrl('http://mydomain:8080/')
	room('#my-room')
	notifyUnstable(true)
	notifyFailure(true)
	notifyBackToNormal(true)
	includeTestSummary(true)

	<?xml version="1.0" encoding="UTF-8"?>

	<opml version="1.0">
	<head>
	<title>Stephen subscriptions in feedly Cloud</title>
	</head>
	<body>
	<outline text="Companies" title="Companies">
	<outline type="rss" text="Trello" title="Trello" xmlUrl="https://trello.engineering/feed.xml" htmlUrl="http://tech.trello.com/"/>
	<outline type="rss" text="IMVU" title="IMVU" xmlUrl="http://engineering.imvu.com/feed/" htmlUrl="https://engineering.imvu.com"/>

	# cat /etc/fail2ban/filter.d/gitlab.conf
	# fail2ban filter configuration for gitlab
	# Author: Pawel Chmielinski

	[Init]
	maxlines = 6

	[Definition]

	# The relevant log file is in /var/log/gitlab/gitlab-rails/production.log

	function drips(){
	docker ps -q \| xargs -n 1 docker inspect --format '{{ .NetworkSettings.IPAddress }} {{ .Name }}' \| sed 's/ \// /'
	}