Sec Wang secwang

Byobu (over SSH) Cheat Sheet

I often find myself using Byobu on a Linux machine when connected to it over SSH. In doing so, I've noticed that many of the documented keyboard shortcuts don't work. This can be due to the native PC's OS intercepting certain keys, or possibly other reasons.

Below is a cheatsheet with Byobu features I have found usually work when run over a SSH connection.

Action	Windows + Putty to Ubuntu	MacOS + Terminal to Ubuntu
Help menu	BASH: byobu-config	FN-F1
Create new window	CTRL-a c	CTRL-a c or FN-F2

Excel essentials

Advanced Excel Skills

Analyse trends using Sparklines!

Display the relationships between formulas and cells

How to do VLOOKUP in Excel

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

Rich Hickey on becoming a better developer

Rich Hickey • 3 years ago

Sorry, I have to disagree with the entire premise here.

A wide variety of experiences might lead to well-roundedness, but not to greatness, nor even goodness. By constantly switching from one thing to another you are always reaching above your comfort zone, yes, but doing so by resetting your skill and knowledge level to zero.

Mastery comes from a combination of at least several of the following:

	(ql:quickload :ironclad)
	(defpackage :test (:use :cl :ironclad))
	(in-package :test)

	(defun hmac-sha256 (secret data)
	(let* ((secret-bytes (ascii-string-to-byte-array secret))
	(data-bytes (ascii-string-to-byte-array data))
	(h (make-hmac secret-bytes :sha256)))
	(update-hmac h data-bytes)
	(byte-array-to-hex-string (hmac-digest h))))

	# LVDB - LLOOGG Memory DB
	# Copyriht (C) 2009 Salvatore Sanfilippo <[email protected]>
	# All Rights Reserved

	# TODO
	# - cron with cleanup of timedout clients, automatic dump
	# - the dump should use array startsearch to write it line by line
	# and may just use gets to read element by element and load the whole state.
	# - 'help','stopserver','saveandstopserver','save','load','reset','keys' commands.
	# - ttl with milliseconds resolution 'ttl a 1000'. Check ttl in dump!

	-- Import Pinboard bookmarks
	-- Created by Christian Grunenberg on Mon Jan 23 2006.
	-- Modified by Rafael Bugajewski to support Pinboard instead of Delicious on Sun Dec 19 2010.
	-- Modified by Andreas Zeitler on Sun Mar 03 2011 to display user feedback when finished
	-- Modified by Mitchell Hewes on 2017-04-03 to archive bookmarks as PDF documents
	-- Copyright (c) 2006-2014. All rights reserved.

	-- If the properties pUser and pPassword are undefined then a dialog pops up asking for these properties
	property pUser : ""
	property pPassword : ""

	# Install tmux 2.8 on Centos

	# install deps
	yum install gcc kernel-devel make ncurses-devel

	# cd src
	cd /usr/local/src

	# DOWNLOAD SOURCES FOR LIBEVENT AND MAKE AND INSTALL
	curl -LO https://github.com/libevent/libevent/releases/download/release-2.1.8-stable/libevent-2.1.8-stable.tar.gz

	.markdown-here-wrapper {
	font-size: 16px;
	line-height: 1.8em;
	letter-spacing: 0.1em;
	}


	pre, code {
	font-size: 14px;
	font-family: Roboto, 'Courier New', Consolas, Inconsolata, Courier, monospace;

	extension Character {

	var scalrValue: UInt32 {
	return String(self).unicodeScalars.first!.value
	}

	var isChineseCharacter: Bool {
	switch self.scalrValue {
	case 0x4E00...0x9FFF, 0x3400...0x4DBF, 0x20000...0x2A6DF, 0x2A700...0x2B73F: return true
	default: return false