Johann Chang mrjohannchang

This document has moved!

It's now here, in The Programmer's Compendium. The content is the same as before, but being part of the compendium means that it's actively maintained.

Tuning Windows 10 for Slow Machines

This guide is for those who dares to install Windows 10 on slow netbooks (1GB of RAM).
Though Windows update program is over, you still may use old Windows product keys from license stickers to install Windows 10 on old machines.

UPD Jan 2019
This article is quite old, some instructions may be obsolete.

Enable persistent storage for the systemd journal log

Overview

The assumed default setting in /etc/systemd/journald.conf is Storage=auto which implies that systemd journaling will only persist the journal if the expected storage location is available. Otherwise, the journal data is stored in memory and lost between reboots. On Ubuntu 16.04, /var/log/journal does not exist by default. Create it to keep and query events from previous boots.

Considerations:

Syslog still provides the persistant log records for Ubuntu 16.04, so enabling persistant systemd journal logging does cause a level of duplicaiton.
There are sane defaults:

1.) Download a Nerd Font

2.) Unzip and copy to ~/.fonts

3.) Run the command fc-cache -fv to manually rebuild the font cache

	import avro.schema
	import io, random
	from avro.io import DatumWriter, DatumReader
	import avro.io

	# Path to user.avsc avro schema
	schema_path="user.avsc"
	schema = avro.schema.parse(open(schema_path).read())

	import Image
	import sys
	import glob
	import ImageOps

	# Trim all png images with white background in a folder
	# Usage "python PNGWhiteTrim.py ../someFolder"

	try:
	folderName = sys.argv[1]

	[merge]
	tool = vimdiff
	[mergetool]
	prompt = true
	[mergetool "vimdiff"]
	cmd = nvim -d $LOCAL $REMOTE $MERGED -c '$wincmd w' -c 'wincmd J'
	[difftool]
	prompt = false
	[diff]
	tool = vimdiff

	# Created by .ignore support plugin (hsz.mobi)
	### Python template
	# Byte-compiled / optimized / DLL files
	__pycache__/
	*.py[cod]
	*$py.class

	# C extensions
	*.so

	#!/bin/sh
	# http://stackoverflow.com/a/38740102/874188

	for p; do
	printf "/proc/%i/stat\0" "$p"
	done \|
	xargs -r0 awk -v ticks="$(getconf CLK_TCK)" 'NR==1 { now=$1; next }
	{ print strftime("%c " $1 " " $2, systime() - (now-($22/ticks))) }
	' /proc/uptime

	func ComputeHmac256(message string, secret string) string {
	key := []byte(secret)
	h := hmac.New(sha256.New, key)
	h.Write([]byte(message))
	return base64.StdEncoding.EncodeToString(h.Sum(nil))
	}