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OpenVPN .ovpn manipulation.

This is how you can take an OpenVPN .ovpn config file and extract the certificates/keys required to import the profile into NetworkManager.

• Download the .ovpn file. Save it somewhere you can store it permanently (I use ~/.vpn).
• Copy from between <ca> tags into ca.crt, remove <ca> tags.
• Copy from between <cert> tags into client.crt, remove <cert> tags.
• Copy from between <key> tags into client.key, remove <key> tags.
• Copy from between <tls-auth> tags into ta.key, remove <tls-auth> tags.
• Remove the line "key-direction 1"
• Above "# -----BEGIN RSA SIGNATURE-----" insert the following lines.

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Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

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Enable Docker Remote API with TLS client verification

Docker's Remote API can be secured via TLS and client certificate verification.
First of all you need a few certificates and keys:

• CA certificate
• Server certificate
• Server key
• Client certificate
• Client key

Create certificate files

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# use https://github.com/lambci/docker-lambda to simulate a lambda environment
docker run -it --rm --entrypoint bash -e ODBCINI=/opt/odbc.ini -e ODBCSYSINI=/opt/ lambci/lambda:build-python3.7

# download and install unixODBC
# http://www.unixodbc.org/download.html
curl ftp://ftp.unixodbc.org/pub/unixODBC/unixODBC-2.3.7.tar.gz -O
tar xzvf unixODBC-2.3.7.tar.gz
cd unixODBC-2.3.7

./configure --sysconfdir=/opt --disable-gui --disable-drivers --enable-iconv --with-iconv-char-enc=UTF8 --with-iconv-ucode-enc=UTF16LE --prefix=/opt

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# Delete all containers
docker rm $(docker ps -aq)
# Delete all images
docker rmi $(docker images -q)
# Delete all untagged images
docker rmi $(docker images -q --filter "dangling=true")

References:

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// Restify Server CheatSheet.
// More about the API: http://mcavage.me/node-restify/#server-api
// Install restify with npm install restify


// 1.1. Creating a Server.
// http://mcavage.me/node-restify/#Creating-a-Server


var restify = require('restify');

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Run commands on remote Docker host

This is how to connect to another host with your docker client, without modifying your local Docker installation or when you don't have a local Docker installation.

Enable Docker Remote API

First be sure to enable the Docker Remote API on the remote host.

This can easily be done with a container.
For HTTP connection use jarkt/docker-remote-api.
For HTTPS connection use whiledo/docker-remote-api-tls.

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$/
  artifacts/
  build/
  docs/
  lib/
  packages/
  samples/
  src/
 tests/

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function Install-VisualStudio
{
[CmdletBinding()]
param (
    [string] $ImagePath,
    [string[]] $ArgumentList,
    [string] $InstallPath,
    [string] $ProductKey
)
    Write-Verbose "Install Visual Studio 2012..."

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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <!-- @FearTheCowboy's Simple PowerShell Task for MSBuild -->
  <UsingTask TaskName="PowerShell" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v12.0.dll">
    <ParameterGroup><ScriptBlock ParameterType="System.String" Required="true" /></ParameterGroup>
    <Task><Reference Include="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v12.0.dll"/><Code Type="Class" Language="cs"><![CDATA[
    public class PowerShell : Microsoft.Build.Tasks.Exec {
        public string ScriptBlock {set { EchoOff=true; Command = string.Format( "@powershell \"Invoke-Command -ScriptBlock {{ $errorActionPreference='Stop'; {0} ; exit $LASTEXITCODE }} \"",  value.Replace("\"","\"\"").Replace("\r\n",";").Replace("\n",";").Replace("\r",";")); } }
    }]]></Code></Task>
  </UsingTask>