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@rob-murray
rob-murray / find_dups.rb
Created October 27, 2015 09:59
Rails find duplicate records
columns_that_make_record_distinct = [:some_id, :another_name]
distinct_ids = Model.select("MIN(id) as id").group(columns_that_make_record_distinct).map(&:id)
duplicate_records = Model.where.not(id: distinct_ids)
sudo apt-get update
sudo apt-get install build-essential chrpath libssl-dev libxft-dev -y
sudo apt-get install libfreetype6 libfreetype6-dev -y
sudo apt-get install libfontconfig1 libfontconfig1-dev -y
cd ~
export PHANTOM_JS="phantomjs-2.1.1-linux-x86_64"
wget https://github.com/Medium/phantomjs/releases/download/v2.1.1/$PHANTOM_JS.tar.bz2
sudo tar xvjf $PHANTOM_JS.tar.bz2
sudo mv $PHANTOM_JS /usr/local/share
sudo ln -sf /usr/local/share/$PHANTOM_JS/bin/phantomjs /usr/local/bin
@andywer
andywer / postgres-outage.md
Created August 21, 2018 05:03
Post Mortem: Postgres outage on 2018-08-20

2018-08-20: Postgres failure

What happened

The PostgreSQL container stopped unexpectedly, was automatically restarted, but suddenly didn't accept any connections anymore. Neither from the API service containers nor from the Macbook over the internet.

Error in logs:

FATAL:  pg_hba.conf rejects connection for host "10.0.1.2", user "postgres", database "******", SSL off
@bistory
bistory / Klipper Anycubic i3 Mega
Last active May 6, 2024 09:53
Anycubic i3 Mega configuration for Klipper (with TMC2209 + SPI, BMG extruder with stock motor, pressure advance and BLTouch clone)
# This file contains pin mappings for the Anycubic i3 Mega with
# Ultrabase from 2017. (This config may work on an Anycubic i3 Mega v1
# prior to the Ultrabase if you comment out the definition of the
# endstop_pin in the stepper_z1 section.) To use this config, the
# firmware should be compiled for the AVR atmega2560.
# See the example.cfg file for a description of available parameters.
[stepper_x]
step_pin: PF0
@ktosiek
ktosiek / PA profile-set astro-a50-gen4.conf
Last active February 27, 2024 22:46
Astro A50 support on Linux - basic configuration for PulseAudio 13 (tested on Ubuntu's 13.99.1). Install the files and reboot, to make sure udev and PA reloaded :-)
; /usr/share/pulseaudio/alsa-mixer/profile-sets/astro-a50-gen4.conf
[General]
auto-profiles = yes
[Mapping analog-voice]
description = Voice
device-strings = hw:%f,0,0
channel-map = left,right
paths-output = steelseries-arctis-output-chat-common
@kmobs
kmobs / frequencytester.md
Last active March 29, 2024 14:44
Frequency Tester

Frequency Testing

This will allow you to test a specific frequency that you hear when you do your resonance testing in Klipper and potentially track down where extra peaks are coming from. If something is rattling at a specific frequency, you can specify that frequency and feel around the printer until you track it down.

Code was adopted by zifnab from somewhere in Klipper.

Usage

You have to have [resonance_holder] in your printer.cfg.

The command is HOLD_RESONANCE AXIS=<axis> FREQ=int SECONDS=<seconds>