RainMark

#!/bin/bash
set -ex

UBUNTU_VERSION="14.04"

mkdirs(){
lxc delete hadoop-master --force
lxc delete hadoop-slave-1 --force
lxc delete hadoop-slave-2 --force
rm -rf /tmp/*

RainMark

;; Elisp session in REPL IELM
;;
;;
;;

ELISP> (defmacro inc (var)
  (list 'setq var (list '1+ var)))
inc
ELISP> (setq x 0)
0 (#o0, #x0, ?\C-@)

RainMark

Some examples of SNAT, DNAT with iptables with comments

mainly used in start-up script

masquarade all outgoing packets to be WLAN0 IP

iptables -t nat -A PREROUTING -s 192.168.1.2 -i eth0 -j MASQUERADE

All packets leaving eth0 will have src eth0 ip address

RainMark

import asyncio
import socket

BIND_IP = "127.0.0.1"
TCP_PORT = 1234
SOCK_BACKLOG = 32
IP_TRANSPARENT = 19

desc = f"""
Anybind; "bind" on many IPs and many Ports.

RainMark

#!/usr/bin/env python

"""Extend Python's built in HTTP server to save files

curl or wget can be used to send files with options similar to the following

  curl -X PUT --upload-file somefile.txt http://localhost:8000
  wget -O- --method=PUT --body-file=somefile.txt http://localhost:8000/somefile.txt

__Note__: curl automatically appends the filename onto the end of the URL so

RainMark

# sourcing this file will define a bash functions that 
# tries to run subsequent calls to emacs with 24 bit color.
#
# It sets TERM=xterm-emacs-leg if 
# - we've created a user-local terminfo record for xterm-emacs-leg, and
# - we're using iTerm2 or something has set COLORTERM=truecolor
# 
# This will cause emacs to use 24 bit color only when it will work,
# inside or outside of tmux. I haven't found a way to auto-detect Blink.sh yet.
#

RainMark

#! /usr/bin/env bash
#
# Run parallel commands and fail if any of them fails.
#

set -eu

pids=()

for x in 1 2 3; do

RainMark

Table of Contents

• set -e, -u, -x, -o pipefail
• set -e
• set -x
• set -u
• set -o pipefail
• Setting IFS
• Original Reference

set -e, -u, -x, -o pipefail