RainMark

## bash_strict_mode.md

      
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                RainMark
                / bash_strict_mode.md
            
            
              Created
              March 1, 2024 10:25
                — forked from mohanpedala/bash_strict_mode.md
            
              
                set -e, -u, -o, -x pipefail explanation
              
          
    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


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

set -eu

pids=()

for x in 1 2 3; do

## colorize-emacs.bashsource
# 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.
#

## httpsrv.py
#!/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

## anybind_aio.py
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.

## snat_dnat_advantech.md

      
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                RainMark
                / snat_dnat_advantech.md
            
            
              Created
              November 12, 2021 01:47
                — forked from tomasinouk/snat_dnat_advantech.md
            
              
                examples of SNAT, DNAT with iptables for Advantech, Conel routers, with comments (probably will work on other routers where iptables can be manipulated, care needs to be taken on applying these commands after reboot). 
              
          
    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


## macros.el
;; Elisp session in REPL IELM
;;
;;
;;

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

## deploy-automated-hadoop-setup-on-lxd.sh
#!/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/*
	#! /usr/bin/env bash
	#
	# Run parallel commands and fail if any of them fails.
	#

	set -eu

	pids=()

	for x in 1 2 3; do
	# 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.
	#
	#!/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
	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.
	;; Elisp session in REPL IELM
	;;
	;;
	;;

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