jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

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

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

magnetikonline

BIND - delegate a sub domain for a zone

The scenario:

• DNS zone myzone.com defined in BIND.
• Authoritative name server at 123.16.123.1.
• Subzone sub.myzone.com with an authoritative name server at 123.16.123.10.
• Wishing to forward sub-zone to authoritative name server.

Config

Nihisil

...

action_with_slack_notification = %(banaction)s[name=%(__name__)s, port="%(port)$
                                 slack[name=%(__name__)s]
                                 
action = %(action_with_slack_notification)s

...

Dman46

...

action_with_slack_notification = %(banaction)s[name=%(__name__)s, bantime="%(bantime)s", port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"]
                                 slack[name=%(__name__)s]
                                 
action = %(action_with_slack_notification)s

...

lewisridden

[
  {
    "name": "Iris Keyboard",
    "author": "Lewis Ridden"
  },
  [
    {
      "x": 3,
      "c": "#c4c8c5",
      "a": 5

Biont

#!/usr/bin/env bash
# terminal application launcher for sway, using fzf
# Based on: https://gitlab.com/FlyingWombat/my-scripts/blob/master/sway-launcher

shopt -s nullglob
if [[ "$1" == 'describe' ]]; then
  shift
  if [[ $2 == 'command' ]]; then
    title=$1
    readarray arr < <(whatis -l "$1" 2>/dev/null)

IanColdwater

Mute these words in your settings here: https://twitter.com/settings/muted_keywords

ActivityTweet
generic_activity_highlights
generic_activity_momentsbreaking
RankedOrganicTweet
suggest_activity
suggest_activity_feed
suggest_activity_highlights
suggest_activity_tweet

daimaou92

#!/bin/bash
NUM_SERVERS=$1
if [ -z "$NUM_SERVERS" ]; then
	NUM_SERVERS=20
fi

if [ ! -f "/etc/arch-release" ]; then
	echo "This script should only run on arch linux"
	exit 1
fi