Jason Sun sunapi386

One time I accidentally messed with the /etc/passwd and locked myself out of being able to SSH into the machine. Since this is a remote machine in AWS I had no way of doing what I'd normally do. Which is attaching a keyboard and monitor and fixing this manually.

To fix, use the AWS EC2 Management page to:

spin up a new instance of vanilla ubuntu EC2 (let's call it David)
shutdown the locked machine (let's call it Goliath)
unmount Goliath's volume
attach the volume to David

Then follow this guide: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-using-volumes.html

to read

tools

startups

selling startup https://justinkan.com/the-founders-guide-to-selling-your-company-a1b2025c9481

programming

FWIW: I didn't produce the content present here. I've just copy-pasted it from somewhere over the Internet, but I cannot remember exactly the original source. I was also not able to find the author's name, so I cannot give him/her the proper credit.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

	#!/bin/bash
	record_screen() {
	SCREEN_RES=$(xrandr -q --current \| grep '*' \| awk '{print$1}')
	DATE=$(date '+%Y-%m-%d-%H:%M:%S')
	echo "saving to recording_$DATE.mkv"
	echo "Ctrl-C to exit"
	ffmpeg -loglevel panic -f x11grab -s $SCREEN_RES -i :0.0 -r 25 -vcodec libx264 "recording_$DATE.mkv"
	}
	record_screen

	#!/usr/bin/env bash
	# Given a fresh install of a Raspian OS, install the necessary tools.
	# This is only meant to run once to setup a brand new fresh OS install.
	#
	# Author: Jason Sun
	# Date: Feb 01, 2018
	#

	packages(){
	sudo apt update

	# Jason Sun sunapi386@gmail.com
	# Jan 22, 2018.
	# Sets a registry `key` in `path` every `duration` seconds to `value`.
	# E.g. Add/update a registry DWORD entry, set NC_ShowSharedAccessUI = 1
	# Can be compiled to exe with:
	# pyinstaller --onefile register_moniter.py
	# See reference https://pythonhosted.org/PyInstaller/usage.html
	from time import sleep
	import winreg
	import ctypes

	#!/bin/bash

	###########################################################################
	# /usr/local/bin/x11vnc-start
	# Starts VNC server for the current session
	#
	# Gustavo Neves - 4th Jul 2016
	#
	# Install x11vnc:
	# sudo apt-get install x11vnc

	>> help
	mode <m> [p] Set mode <m> for port [p] or all ports
	mode c p f Set charge mode for port p using profile f if attached
	state [p] Show state for port [p] or all ports
	system Show hardware and firmware information
	health Show voltages, temperature, error & boot flag
	cef Clear error flags
	sef <flag> Set error flag. One of: 5UV 5OV 12UV 12OV OT
	crf Clear rebooted flag
	limits Show voltage & temperature limits

	# DP practice problem.
	# Feb 21, 2017.
	# Jason Sun sunapi386.ca
	#
	# Problem
	#
	# You are a given collection of coins, where each stack of coins is of h height, and there are s stacks.
	# Take exactly h coins, such that the sum of the coins is the maximum possible.
	# Caveat: if you take a coin from a stack, all the coins above it must be taken too.
	#

	bash-3.2$ find . \( -iname ".h" -o -iname ".c" \) -exec /bin/echo {} + \| xargs awk -f lc.awk


	--------------------------------File---Code---Comments---Raw Lines
	-------------- ./include/kernel/scheduler.h 68 11 93
	./user/sensor.c 154 25 190
	./track/new/track_data_new.c 2352 1 2357
	./include/user/clock_drawer.h 4 0 6
	./include/utils.h 36 0 46
	./include/user/parser.h 5 0 6