udkyo

slow

This bash script offers quick shortcuts to simulate slower network connections. It is useful when you need to simulate a wireless network on a Linux network server, especially when you are using a virtual machine guest on your local machine or in the cloud.

slow 3G                   # Slow network on default eth0 down to 3G wireless speeds
slow reset                # Reset connection for default eth0 to normal
slow vsat --latency=500ms # Simulate satellite internet  with a high latency
slow dsl -b 1mbps         # Simulate DSL with a slower speed than the default

slow modem-56k -d eth0 # Simulate a 56k modem on the eth1 device. eth0 is unchanged.

udkyo

version: "3.4"

services:
  spawner:
    image: docker
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    entrypoint: |
      sh -c "docker run --rm --name childcontainer --network ${stack}_default -d alpine sleep 10 && ping childcontainer"
      

udkyo

FROM ubuntu
RUN apt update \
    && apt install -y firefox \
                      openssh-server \
                      xauth \
    && mkdir /var/run/sshd \
    && mkdir /root/.ssh \
    && chmod 700 /root/.ssh \
    && ssh-keygen -A \
    && sed -i "s/^.*PasswordAuthentication.*$/PasswordAuthentication no/" /etc/ssh/sshd_config \

udkyo

data "external" "public_ip" {
    program = [ "sh", "-c", "echo {\\\"ip\\\": \\\"$(curl ifconfig.io)\\\"}" ]
    //populates ${data.external.public_ip.result.ip}
}

udkyo

// I read some needlessly confusing explanations of channels when I was
// learning go, so I figured I'd post a very straightforward example and
// describe it to death with comments
//
// If anyone ever stumbles across it, I hope it helps :)
package main

import (
	"fmt"
	"time"

udkyo

# I use this for quickly getting SSH pub keys from one host to another in the lab
# when I've provisioned them an awkward way, running this and then something along the lines of
# mkdir ~/.ssh && chmod 755 ~/.ssh && curl [host_with_key] >> ~/.ssh/authorized_keys

while true; do nc -l -p 1500 -c 'echo -e "HTTP/1.1 200 OK\n\n$(cat ~/.ssh/id_rsa.pub)"'; done

udkyo

aws logs describe-log-groups --query 'logGroups[*].logGroupName' --output table | awk '{print $2}' | grep -v ^$ | while read x; do aws logs delete-log-group --log-group-name $x; done

udkyo

#!/bin/bash

# Install OSX Mojave through App Store. After downloading, the "InstallESD" is automatically mounted, which causes this script to fail.
# Therefore, "/Volumes/InstallESD" should be unmounted before running this script!

# Summary of instructions
#1 Download Mojave from App Store
#2 open terminal and run "umount /Volumes/InstallESD"
#3 make script executable: "chmod +x make_mojave_iso.sh"
#4 Run "./make_mojave_iso.sh"

udkyo

hdiutil create -o /tmp/Catalina -size 8000m -layout SPUD -fs HFS+J  
hdiutil attach /tmp/Catalina.dmg -noverify -mountpoint /Volumes/install_build  
sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --nointeraction --volume /Volumes/install_build
hdiutil convert /tmp/Catalina.dmg -format UDTO -o ~/Downloads/Catalina  
mv ~/Downloads/Catalina.cdr ~/Downloads/Catalina.iso  

udkyo

function hist {
  [ ! -d ~/.history ] && mkdir ~/.history
  chmod 700 ~/.history
  name="history$(pwd | sed 's/\//-/g')"
  echo "Using history file $name"
  HISTFILE=~/.history/$name
  HISTSIZE=4096
  SAVEHIST=4096
  setopt appendhistory
  fc -R