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@mowings
mowings / README.md
Last active Sep 29, 2019
Set up xhyve with Ubuntu 16.04
View README.md

Introduction

Setting up an OS to work with xhyve can be a bit tricky, but it's not impossible. These intructions should be generally applicable to most versions of Linux.

Create a disk image file

Xhyve will use a file as a logical disk. Be sure you have the filesize you need, because growing the file later is tricky to impossible (you could try to use qcow or similar to get around this, but qcow volumes can be tricky to mount).

dd if=/dev/zero of=hdd.img bs=1g count=32 # Create a 32 gig disk. Raise 'count' as desired
@maxvt
maxvt / infra-secret-management-overview.md
Last active Oct 8, 2019
Infrastructure Secret Management Software Overview
View infra-secret-management-overview.md

Currently, there is an explosion of tools that aim to manage secrets for automated, cloud native infrastructure management. Daniel Somerfield did some work classifying the various approaches, but (as far as I know) no one has made a recent effort to summarize the various tools.

This is an attempt to give a quick overview of what can be found out there. The list is alphabetical. There will be tools that are missing, and some of the facts might be wrong--I welcome your corrections. For the purpose, I can be reached via @maxvt on Twitter, or just leave me a comment here.

There is a companion feature matrix of various tools. Comments are welcome in the same manner.

@mattrude
mattrude / GnuPG-2.1.md
Last active Sep 5, 2019
GnuPG 2.1.18 Build Instructions for Ubuntu 16.04 LTS
View GnuPG-2.1.md

GnuPG 2.1.20 Build Instructions

Below you is my build instructions for GnuPG 2.1.20 released on 03-Apr-2017. These instructions are built for a headless Ubuntu 16.04 LTS server.

Or if you wish, you may use the install script to install GnuPG 2.1.20 by entring the following:

curl -sL "https://gist.github.com/mattrude/3883a3801613b048d45b/raw/install-gnupg2.sh" |sh

Install the needed depends

apt-get -y install libgnutls-dev bzip2 make gettext texinfo gnutls-bin \
@jboner
jboner / latency.txt
Last active Oct 14, 2019
Latency Numbers Every Programmer Should Know
View latency.txt
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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