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

adrienbrault

#!/bin/sh

# Credits to:
#  - http://vstone.eu/reducing-vagrant-box-size/
#  - https://github.com/mitchellh/vagrant/issues/343

aptitude -y purge ri
aptitude -y purge installation-report landscape-common wireless-tools wpasupplicant ubuntu-serverguide
aptitude -y purge python-dbus libnl1 python-smartpm python-twisted-core libiw30
aptitude -y purge python-twisted-bin libdbus-glib-1-2 python-pexpect python-pycurl python-serial python-gobject python-pam python-openssl libffi5

BlakeGardner

# Last updated March, 2022 for Apple silicon Macs
# Install Homebrew if you don't already have it: https://brew.sh

# install nano from homebrew
brew install nano nanorc

# update your nanorc file
echo 'include "/opt/homebrew/share/nanorc/*.nanorc"' >> ~/.nanorc

# close and re-open your terminal and you'll have syntax highlighting

ofstudio

# Get password from OS X Keychain function
# Replace %ACCOUNT_NAME% with account name of Keychain item
# See `man security` for more info
get_pw () {
  security 2>&1 >/dev/null find-generic-password -ga "%ACCOUNT_NAME%" \
  | sed 's/password: "\(.*\)"/\1/'
}

# Don't store server credentials in plain text!
PASS=$(get_pw)

srijanshetty

We’re now going to clean up disk space on the VM so when we package it into a new Vagrant box, it’s as clean as possible. First, remove APT cache

$ sudo apt-get clean

Then, “zero out” the drive (this is for Ubuntu):

$ sudo dd if=/dev/zero of=/EMPTY bs=1M

tinkerbotfoo

###requirements.txt
#pycrypto 
#pyopenssl

## Creds
AWS_EC2_ACCESS_ID='AKIA**********'
AWS_EC2_SECRET_KEY = 'mh83**************'
PEM_FILE = os.path.expanduser('D:\\abc\\scripts\\s\\test.pem')

### Get Windows Admin password of the newly created AWS instance

ccampanale

#!/bin/bash

export vault=/usr/local/bin/vault
export VAULT_TOKEN=$(cat /root/.vault-token)
vault_cacert='-ca-cert=/path/to/your/ca.pem'
local_vault="-address=https://$(hostname -f):8200"
unsealed_vault="-address=https://$(getent hosts $(dig +short vault.service.consul  | tail -n 1) | awk '{ print $2 }'):8200"
leader_vault="-address=https://$($vault status $vault_cacert $unsealed_vault 2> /dev/null | grep Leader | awk '{ print $2 }' | sed 's/^http\(\|s\):\/\///g'):8200"
vault_read="$vault read $vault_cacert $leader_vault"
vault_unseal="$vault unseal $vault_cacert $local_vault"

bastman

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

Xainey

# Add nix-like touch command
function touch
{
    $file = $args[0]

    if($file -eq $null) 
    {
        throw "No filename supplied"
    }

jgamblin

#!/bin/bash
APIKEY="From Here https://api.slack.com/custom-integrations/legacy-tokens"
SONG=$(osascript -e 'tell application "Spotify" to name of current track as string')
URLSONG=$(echo "$SONG" | perl -MURI::Escape -ne 'chomp;print uri_escape($_),"\n"')

while true
do
curl -s -d "payload=$json" "https://slack.com/api/users.profile.set?token="$APIKEY"&profile=%7B%22status_text%22%3A%22"$URLSONG"%22%2C%22status_emoji%22%3A%22%3Amusical_note%3A%22%7D"  > /dev/null
sleep 60 
done