dmke

begin
  require "bundler/inline"
rescue LoadError => e
  $stderr.puts "Bundler version 1.10 or later is required. Please update your Bundler"
  raise e
end

gemfile do
  source "https://rubygems.org"
  gem "rails", "6.1.4.1"

dmke

Annotated list of SQLite queries for PowerDNS 4.1+

To retrieve all queries known to PowerDNS, run something like

# pdns_server --no-config --launch=gsqlite3 --config | fgrep '# gsqlite3-'

Then go visit the [Generic SQL Backends][docs] documentation and find your query documentation (by removing the gsqlite3- prefix from the pdns_server output from above).

dmke

This is a response/extension to the Deep directory structure vs. flat directory structure to store millions of files on ext4 article on Medium. Here, I'm benchmarking not only a nesting level of two, but different levels.

This benchmark currently runs on an otherwise idle physical server with this specs:

• HDD: spinning, encrypted (RAID 10)
• CPU: Intel i7-2600 (4 cores + HT @ 3.4GHz)
• RAM: 16GB

dmke

#!/bin/sh

echo 2>&1 "this is just a sample, not intended for execution"
exit 1

cd $LEDE_ROOT
git checkout 20d3c118ae # latest commit in master at time of writing

cp $gist["config"] .config
make defconfig

dmke

Performing UDP tunneling through an SSH connection

Intro

The Swiss ISP [Bluewin][] sucks. Their DNS are often down. A friend even received advice from Bluewin technicians to not use their own DNS!... But then, it is quite hard to gain access to another DNS for free, if you don't have access to a co hosted machine.

In this document, we'll access another machine's network internal DNS services (UDP

dmke

package main

var n = func() int { return 42 }()

var (
	m = func() int { return 23 }()
	o = getTruth()
)

func main() {

dmke

"Frozen soft reset" on MT7261 SoCs with 32M flash

This hack is derived from [this mail][] by Paul Fertser on openwrt-devel.

• When using 32M flash, the SPI bus needs to be reconfigured to use 4-byte addressing mode, instead of the usual (?) 3-byte mode.
• Issueing a soft reset without this patch leaves the bus in 4-byte mode, which then crashes the system because the SoC tries (and fails) to communicate in 3-byte addressing mode.
• Writing the opcodes brings the SPI back into 3-byte addressing mode,

dmke

#include zbt.dsti

&spi0 {
	m25p80@0 {
		partition@50000 {
			reg = <0x50000 0x1fb0000>
		};
	};
};

dmke

#!/bin/bash -e

self=$(readlink -f "$0")
root=$(dirname "$self")

version="$1"
checksum="$2"

if [ -z "$version" ]; then
  echo >&2 "Missing version specifier."

dmke

influxdb-ruby: 0.3.0
influx server: 0.10.2

purging existing data...
generating data:
  UNIT_000 : {:consumed_energy=>5.0, :frequency=>5.0, :power_factor=>5.0, :reactive_watts=>5.0, :rms_voltage=>5.0, :temperature=>5.0}
  UNIT_001 : {:consumed_energy=>5.0, :frequency=>5.0, :power_factor=>5.0, :reactive_watts=>5.0, :rms_voltage=>5.0, :temperature=>5.0}
  UNIT_002 : {:consumed_energy=>5.0, :frequency=>5.0, :power_factor=>5.0, :reactive_watts=>5.0, :rms_voltage=>5.0, :temperature=>5.0}
  UNIT_003 : {:consumed_energy=>5.0, :frequency=>5.0, :power_factor=>5.0, :reactive_watts=>5.0, :rms_voltage=>5.0, :temperature=>5.0}
  UNIT_004 : {:consumed_energy=>5.0, :frequency=>5.0, :power_factor=>5.0, :reactive_watts=>5.0, :rms_voltage=>5.0, :temperature=>5.0}