luk3thomas

source "https://rubygems.org"

gem "rack"
gem "rack-proxy"

crgimenes

package main

import (
	"bytes"
	"fmt"
	"io"
	"os"
	"strings"
)

steven2358

FFmpeg cheat sheet

A list of useful commands for the FFmpeg command line tool.

Download FFmpeg: https://www.ffmpeg.org/download.html

Full documentation: https://www.ffmpeg.org/ffmpeg.html

Basic conversion

jon-a-nygaard

A Highcharts example in use with Webpack and Babel.

Install

1. Download source files
2. Run npm install to install all dependencies.
3. Run npm run build to bundle app.js into bundle.js

Open application

1. Open index.html in a browser.

DominicBreuker

iptables cheat sheet

Concepts

iptables defines tables, which group features:

• filter: use it to filter traffic
• nat: use it to implement NAT
• raw: use it to define which connections iptables should track (stateful firewall)
• mangle: use it to change some fields in packets (e.g., TTL)
• security: use it to define access control

rubencaro

Golang installation guide

Since Golang version 1.11 this process is finally (almost) as easy as it should (!!). You can see full docs here. For older guides see here.

These are my notes, not a generic solution. They are not meant to work anywhere outside my machines. Update version numbers to whatever are the current ones while you do this.

Installing everything needed the first time

Install asdf and its golang plugin, then install golang

galexrt

#!/bin/bash

version="${VERSION:-1.0.1}"
arch="${ARCH:-linux-amd64}"
bin_dir="${BIN_DIR:-/usr/local/bin}"

wget "https://github.com/prometheus/node_exporter/releases/download/v$version/node_exporter-$version.$arch.tar.gz" \
    -O /tmp/node_exporter.tar.gz

mkdir -p /tmp/node_exporter

trastle

global:
  scrape_interval: 60s

  external_labels:
    monitor: 'example'

rule_files:
  - /etc/prometheus/config/*.rules

scrape_configs:

enjalot

Quick, Draw! ndjson data

The Quick, Draw! dataset uses ndjson as one of the formats to store its millions of drawings.

We can use the ndjons-cli utility to quickly create interesting subsets of this dataset.

The drawings (stroke data and associated metadata) are stored as one JSON object per line. e.g.:

{

ageis

security and hardening options for systemd service units

A common and reliable pattern in service unit files is thus:

NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
DevicePolicy=closed
ProtectSystem=strict