thwarted

#!/usr/bin/env python

# with help and inspiration from
#  * ASN1_generate_nconf(3) (specifically the SubjectPublicKeyInfo structure)
#  * http://www.sysmic.org/dotclear/index.php?post/2010/03/24/Convert-keys-betweens-GnuPG%2C-OpenSsh-and-OpenSSL
#  * http://blog.oddbit.com/2011/05/converting-openssh-public-keys.html

import sys
import base64
import struct

georgexsh

import sys

def j(lineno):
    frame = sys._getframe().f_back
    called_from = frame

    def hook(frame, event, arg):
        if event == 'line' and frame == called_from:
            try:
                frame.f_lineno = lineno

lonetwin

#!/usr/bin/env python
# A more detailed explaination will come as a blog post soon, but in brief,
# here is the problem that led to this:
#
# For various reasons we have a requirement to implement an 'sftp' like
# abstraction/interface for a service that we provide. Basically we need to
# present objects in our application as a filesystem accessible over sftp.
#
# The way we have decided to go about this is to replace the 'standard' openssh
# sftp subsystem command entry in /etc/ssh/sshd_config on our servers with our

Siva-Charan

Find the dependent child images on Docker

When you try to remove the docker image with the following command

docker rmi 6795374be8c1

Sometimes you might be facing below error:

Error response from daemon: conflict: unable to delete 6795374be8c1 (cannot be forced) - image has dependent child images

Below is the Docker command line used to find the dependent child images

freeformz

A slightly updated version of this doc is here on my website.

Why I Like Go

I visited with PagerDuty yesterday for a little Friday beer and pizza. While there I got started talking about Go. I was asked by Alex, their CEO, why I liked it. Several other people have asked me the same question recently, so I figured it was worth posting.

Goroutines

The first 1/2 of Go's concurrency story. Lightweight, concurrent function execution. You can spawn tons of these if needed and the Go runtime multiplexes them onto the configured number of CPUs/Threads as needed. They start with a super small stack that can grow (and shrink) via dynamic allocation (and freeing). They are as simple as go f(x), where f() is a function.

klovadis

// example function where arguments 2 and 3 are optional
function example( err, optionalA, optionalB, callback ) {

    // retrieve arguments as array
    var args = [];
    for (var i = 0; i < arguments.length; i++) {
        args.push(arguments[i]);
    }

    // first argument is the error object

anildigital

docker rmi $(docker images -q -f dangling=true)

alexmic

import os
import pytest

from alembic.command import upgrade
from alembic.config import Config

from project.factory import create_app
from project.database import db as _db

jdeathe

How to generate a self-signed SAN SSL/TLS certificate using openssl

Generating a self-signed certificate is a common task and the command to generate one with openssl is well known and well documented. Generating a certificate that includes subjectAltName is not so straght forward however. The following example demonstrates how to generate a SAN certificate without making a permanent change to the openssl configuration.

Generate a list of all required DNS names, (Note: CN will be discarded).

$ export SAN="DNS:www.domain.localdomain,DNS:domain.localdomain"

dstroot

#!/bin/bash
###############################################
# To use: 
# https://raw.github.com/gist/2776351/???
# chmod 777 install_postgresql.sh
# ./install_postgresql.sh
###############################################
echo "*****************************************"
echo " Installing PostgreSQL"
echo "*****************************************"