Michalis™ mrmichalis

#Mac OS X

Apps

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

Frontend Development

Attention: the list was moved to

https://github.com/dypsilon/frontend-dev-bookmarks

This page is not maintained anymore, please update your bookmarks.

How does `ls` work?

I wanted to be really able to explain to a fair amount of detail how does the program :command:`ls` actually work right from the moment you type the command name and hit ENTER. What goes on in user space and and in kernel space? This is my attempt and what I have learned so far on Linux (Fedora 19, 3.x kernel).

How does the shell find the location of 'ls' ?

Adventures in Python Core Dumping

After watching Bryan Cantrill's presentation on [Running Aground: Debugging Docker in Production][aground] I got all excited (and strangely nostalgic) about the possibility of core-dumping server-side Python apps whenever they go awry. This would theoretically allow me to fully inspect the state of the program at the point it exploded, rather than relying solely on the information of a stack trace.

Requirements

Minikube requires that VT-x/AMD-v virtualization is enabled in BIOS. To check that this is enabled on OSX / macOS run:

sysctl -a | grep machdep.cpu.features | grep VMX

If there's output, you're good!

Prerequisites

Docker issues are frequently logged for DNS resolution in containers because it doens't inhert or get values for DNS from NetworkManager which leverages a built in dnsmasq to inteligently manage DNS.

Perminant workarround

sudo bash -c "echo listen-address=$(ip -4 addr show dev docker0 | grep -oP '(?<=inet\s)\d+(\.\d+){3}') > /etc/NetworkManager/dnsmasq.d/docker-bridge"
sudo systemctl reload NetworkManager
sudo bash -c 'echo -e "{\n\t\"dns\": [\"$(ip -4 addr show dev docker0 | grep -oP "(?<=inet\s)\d+(\.\d+){3}")\"]\n}" > /etc/docker/daemon.json'
sudo systemctl restart docker

	#!/bin/bash
	# Paste at Pastebin.com using command line (browsers are slow, right?)
	# coder : Anil Dewani
	# date : Novemeber 7, 2010

	#help function
	howto()
	{
	echo "\
	Pastebin.com Bash Script \

	CC0 1.0 Universal

	Statement of Purpose

	The laws of most jurisdictions throughout the world automatically confer
	exclusive Copyright and Related Rights (defined below) upon the creator and
	subsequent owner(s) (each and all, an "owner") of an original work of
	authorship and/or a database (each, a "Work").

	Certain owners wish to permanently relinquish those rights to a Work for the

	# Read the contents of ~/.path into $PATH, if ~/.path exists. ~/.path should be a file
	# consisting of one path on each line, such as:
	#
	# ~$ cat ~/.path
	# # vim: ft=sh
	# ~/usr/bin
	# /opt/local/bin
	# ... etc ...
	#
	# Note that comments begin with a hash (#).