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@robinsmidsrod
robinsmidsrod / _INSTALL.md
Last active June 16, 2024 09:00
Bootstrapping full iPXE native menu with customizable default option with timeout (also includes working Ubuntu 12.04 preseed install)

Add the following chunk to your existing ISC dhcpd.conf file.

if exists user-class and ( option user-class = "iPXE" ) {
    filename "http://boot.smidsrod.lan/boot.ipxe";
}
else {
    filename "undionly.kpxe";
}

(or see https://gist.github.com/4008017 for a more elaborate setup

@hellerbarde
hellerbarde / latency.markdown
Created May 31, 2012 13:16 — forked from jboner/latency.txt
Latency numbers every programmer should know

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

@marktheunissen
marktheunissen / pedantically_commented_playbook.yml
Last active June 5, 2024 22:16 — forked from phred/pedantically_commented_playbook.yml
Insanely complete Ansible playbook, showing off all the options
This playbook has been removed as it is now very outdated.
@mlafeldt
mlafeldt / elf.h
Last active May 5, 2024 05:35
elf.h for OSX
/* This is the original elf.h file from the GNU C Library; I only removed
the inclusion of feature.h and added definitions of __BEGIN_DECLS and
__END_DECLS as documented in
https://cmd.inp.nsk.su/old/cmd2/manuals/gnudocs/gnudocs/libtool/libtool_36.html
On macOS, simply copy the file to /usr/local/include/.
Mathias Lafeldt <mathias.lafeldt@gmail.com> */
/* This file defines standard ELF types, structures, and macros.
@techniq
techniq / base.html
Created November 13, 2012 14:47
Flask-Admin WTForms boostrap-wysihtml5
<!DOCTYPE html>
<html lang="en">
<head><script type="text/javascript">var NREUMQ=NREUMQ||[];NREUMQ.push(["mark","firstbyte",new Date().getTime()]);</script>
<link href='/static/bootstrap/css/bootstrap.css' rel='stylesheet' type='text/css' />
<link href='/static/wysihtml5/bootstrap-wysihtml5.css' rel='stylesheet' type='text/css' />
</head>
<body>
...
<script src="/static/wysihtml5/wysihtml5-0.3.0.min.js"></script>
@vgoklani
vgoklani / app.py
Last active December 19, 2022 09:13
Using Flask to output Python data to High Charts
from flask import Flask, render_template
app = Flask(__name__)
@app.route('/')
@app.route('/index')
def index(chartID = 'chart_ID', chart_type = 'bar', chart_height = 350):
chart = {"renderTo": chartID, "type": chart_type, "height": chart_height,}
series = [{"name": 'Label1', "data": [1,2,3]}, {"name": 'Label2', "data": [4, 5, 6]}]
title = {"text": 'My Title'}
@macabreb0b
macabreb0b / meetupMassUnsubscribe
Last active October 24, 2022 21:18
Unsubscribe from all group notifications on Meetup.com
// Tired of getting Meetup.com notifications? Me too.
// 1. Navigate to: http://www.meetup.com/account/comm/ (you must be logged in!)
// 2. Open your browser's console, and paste in the script below:
$('.commSettings').each(function(idx, item) {var $item = $(item);var boardId = $item.attr("id").split('_')[1];var url = $item.children('form').attr('action');var params = {evRemind:1,mailing_list_status:0, submitButton:'Save Settings', submit:'submit'};params['board_' + boardId] = boardId;$.ajax({data: params, url: url, type: 'post'});});$('.generalEmailSettings').find('input[type="checkbox"]').prop('checked', false);$('.generalEmailSettings').find('input[type="submit"]').click();
@denji
denji / golang-tls.md
Last active July 1, 2024 05:41 — forked from spikebike/client.go
Simple Golang HTTPS/TLS Examples

Moved to git repository: https://github.com/denji/golang-tls

Generate private key (.key)
# Key considerations for algorithm "RSA" ≥ 2048-bit
openssl genrsa -out server.key 2048

# Key considerations for algorithm "ECDSA" ≥ secp384r1
# List ECDSA the supported curves (openssl ecparam -list_curves)
@Sovenger
Sovenger / pxe-cloud-config_internal-network.yml
Last active February 21, 2017 04:58
This is a cloud-config example from a working PXE boot to disk installation for CoreOS
#cloud-config
#Credit: many portions of this config came from the great work detailed here by:
#Behner, brianclements, Metamogul and especially crawford for the cloud-config inside a cloud-config idea:
#https://github.com/coreos/coreos-cloudinit/issues/205
ssh_authorized_keys:
- ssh-rsa <core user key goes here>
#This writes a cloud-config to the PXE booted system that
@lavalamp
lavalamp / The Three Go Landmines.markdown
Last active May 17, 2024 02:07
Golang landmines

There are three easy to make mistakes in go. I present them here in the way they are often found in the wild, not in the way that is easiest to understand.

All three of these mistakes have been made in Kubernetes code, getting past code review at least once each that I know of.

  1. Loop variables are scoped outside the loop.

What do these lines do? Make predictions and then scroll down.

func print(pi *int) { fmt.Println(*pi) }