Maykel Moya mmoya

Set up a ssh tunnel only user

In order to give someone access to hosts that are available only by ssh "bouncing" (ProxyJump), add a user for this specific purpose.

We have an internal openstack where instances get IPs on per-tenant networks. Each tenant has a 'bastion' host that has a "public" ip (floating ip). You can access other instances by bouncing through the bastion. From time to time I want to let someone else into an instance. This could be done either with:

a.) just give them shell access to the bastion and let them hop through. Sharing an unrestricted shell account on my bastion is less than ideal. b.) assign a floating/"public" IP to the instance so they could go directly in. Floating IPs are limited, so this is less than ideal.

So instead, I have set up a single user as described here that can only be used for ProxyJump. It allows others proxied access to my instances but without granting them full shell access.

API Design: Coroutines APIs (Janurary-2017)

I am currently dealing with a lot of libraries at work. Both third party as well as libraries written or being currently in process of being written by me. I absolutely love writing and working with libraries. Especially if they present or bring me to either a new or different approach to solve a problem. Or at least provide a different view.

Over time I noticed however that quite regulary we had to decide that we cannot use a third party library. Often it is the usual reason.

How to recover lost Python source code if it's still resident in-memory

I screwed up using git ("git checkout --" on the wrong file) and managed to delete the code I had just written... but it was still running in a process in a docker container. Here's how I got it back, using https://pypi.python.org/pypi/pyrasite/ and https://pypi.python.org/pypi/uncompyle6

Attach a shell to the docker container

Install GDB (needed by pyrasite)

apt-get update && apt-get install gdb

Hyperlinks (a.k.a. HTML-like anchors) in terminal emulators

[ Update 2025-03-24: Commenting is disabled permanently. Previous comments are archived at web.archive.org. ]

Most of the terminal emulators auto-detect when a URL appears onscreen and allow to conveniently open them (e.g. via Ctrl+click or Cmd+click, or the right click menu).

It was, however, not possible until now for arbitrary text to point to URLs, just as on webpages.

Electron apps

Slide deck frameworks supporting Markdown source

This guide has moved to a GitHub repository to enable collaboration and community input via pull-requests.

https://github.com/alexellis/k8s-on-raspbian

Alex

	image: docker:latest

	# When using dind, it's wise to use the overlayfs driver for
	# improved performance.
	variables:
	DOCKER_DRIVER: overlay
	GCP_PROJECT_ID: CHANGE-TO-GCP-PROJECT-ID
	IMAGE_NAME: image_id

	services:

	#!/usr/bin/python3
	#
	# Simple Bloom filter implementation in Python 3
	# Copyright 2017 Hector Martin "marcan" <[email protected]>
	# Licensed under the terms of the MIT license
	#
	# Written to be used with the Have I been pwned? password list:
	# https://haveibeenpwned.com/passwords
	#
	# Download the pre-computed filter here (968MB, k=11, false positive p=0.0005):

	#!/usr/bin/env python3
	"""
	This is free and unencumbered software released into the public domain.

	Anyone is free to copy, modify, publish, use, compile, sell, or
	distribute this software, either in source code form or as a compiled
	binary, for any purpose, commercial or non-commercial, and by any
	means.

	In jurisdictions that recognize copyright laws, the author or authors

	# /etc/udev/rules.d/20-bt-auto-enable-a2dp.rules
	# hxss
	SUBSYSTEM=="bluetooth", ACTION=="add", RUN+="/home/hxss/.config/scripts/xorg/bt-auto-enable-a2dp.sh"