andreyvit

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

fearthecowboy

  /// ... somewhere in your cmdlet (might need to be PSCmdlet?)

  private const BindingFlags BindingFlags = System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public;
  // provided you have a tasty function to reflect private fields/properties
  protected object TryGetProperty(object instance, string fieldName) {
      // any access of a null object returns null. 
      if (instance == null || string.IsNullOrEmpty(fieldName)) {
          return null;
      }

mattifestation

echo -----BEGIN CERTIFICATE----- > encoded.txt
echo Just Base64 encode your binary data
echo TVoAAA== >> encoded.txt
echo -----END CERTIFICATE----- >> encoded.txt
certutil -decode encoded.txt decoded.bin

ipbastola

Safest way to clean up boot partition - Ubuntu 14.04LTS-x64, Ubuntu 16.04LTS-x64

Reference

Case I: if /boot is not 100% full and apt is working

1. Check the current kernel version

$ uname -r 

iambkramer

choco list -lo -r -y | % { $_.Split('|') | select -First 1 } | % { "choco install " + $_ + " -y" }
choco list -lo -r -y | % { $_.Split('|') | select -First 1 } | % { "choco install " + $_ + " -y" } | Out-file choco-software.txt

zentralwerkstatt

• Install the necessary packages:

sudo apt-get install apt-transport-https ca-certificates
curl -s https://syncthing.net/release-key.txt | sudo apt-key add -
echo "deb https://apt.syncthing.net/ syncthing stable" | sudo tee /etc/apt/sources.list.d/syncthing.list
sudo apt-get update
sudo apt-get install syncthing
sudo apt-get install git

• Start syncthing once:

tuannvm

Kubernetes cheatsheet

• Kubernetes cheatsheet
  • Getting Started
  • Sample yaml
  • Workflow
  • Physical components
    • Master
    • Node
• Everything is an object - persistent entities

jpswade

Find the original here article here: Devops Best Practices

DevOps started out as "Agile Systems Administration". In 2008, at the Agile Conference in Toronto, Andrew Shafer posted an offer to moderate an ad hoc "Birds of a Feather" meeting to discuss the topic of "Agile Infrastructure". Only one person showed up to discuss the topic: Patrick Debois. Their discussions and sharing of ideas with others advanced the concept of "agile systems administration". Debois and Shafer formed an Agile Systems Administrator group on Google, with limited success. Patrick Debois did a presentation called "Infrastructure and Operations" addressing

eeddaann

PromQL

Prometheus is a time-series db, it's query language called PromQL.

Here are some analogies from SQL which may help to understand the basics of PromQL better:

• metric ~ sql table
• label ~ sql column

example:

• Count how many containers running on each node:

elasticdog

#!/usr/bin/env bash

# ensure we were given two command line arguments
if [[ $# -ne 2 ]]; then
	echo 'usage: vault-cp SOURCE DEST' >&2
	exit 1
fi

source=$1
dest=$2