martijnvermaat

Installation of NixOS with encrypted root

These are my notes on instaling NixOS 16.03 on a Lenovo ThinkPad X1 Carbon (4th generation) with an encrypted root file system using UEFI.

Most of this is scrambled from the following pages:

• Encrypted Root on NixOS - Nix Wiki
• Installing NixOS - Chris Martin
• Linux administration and use - Earl Douglas
• Installing NixOS on a ThinkPad W540 with encrypted root - Bluish Coder

CMCDragonkai

Nix String and Path Concatenation

From Bas van Dijk:

To understand these things I would recommend using nix-repl:

$ nix-repl
Welcome to Nix version 1.11.2. Type :? for help.

dongjinleekr

## Consumer Throughput: Single consumer thread, no compression
## Consumer Throughput: 3 consumer thread, no compression

bin/kafka-consumer-perf-test.sh --topic benchmark-3-3-none \
--zookeeper kafka-zk-1:2181,kafka-zk-2:2181,kafka-zk-3:2181 \
--messages 15000000 \
--threads 1

djspiewak

Quick Tips for Fast Code on the JVM

I was talking to a coworker recently about general techniques that almost always form the core of any effort to write very fast, down-to-the-metal hot path code on the JVM, and they pointed out that there really isn't a particularly good place to go for this information. It occurred to me that, really, I had more or less picked up all of it by word of mouth and experience, and there just aren't any good reference sources on the topic. So… here's my word of mouth.

This is by no means a comprehensive gist. It's also important to understand that the techniques that I outline in here are not 100% absolute either. Performance on the JVM is an incredibly complicated subject, and while there are rules that almost always hold true, the "almost" remains very salient. Also, for many or even most applications, there will be other techniques that I'm not mentioning which will have a greater impact. JMH, Java Flight Recorder, and a good profiler are your very best friend! Mea

thomasloven

hass:account
hass:alert
hass:alert-circle
hass:altimeter
hass:apple-safari
hass:apps
hass:arrow-bottom-left
hass:arrow-down
hass:arrow-left
hass:arrow-right

kmagdziak

Issue: Changing the docker port 80 to hosted port not 80 causes the following message:
[ERROR]: Unable to parse results from queryads.php: Unhandled error message (Invalid domain!)

## Solution courtesy of unitpas, modified by kmagdziak

docker exec -it pihole apt-get update
docker exec -it pihole apt-get install nano
docker exec -it pihole bash

nano /var/www/html/pihole/index.php