Chen Zeren owlfox

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

reMarkable is a paper tablet by https://remarkable.com/.

The reMarkable tablet is the best e-paper in the market. However, it does not have built-in support for CJK (Chiniese, Korean and Japanese) users.

Luckily, this could be resolved by installing CJK fonts on the tablet.

Go to Preference > Storage > Enable USB web interface (Beta).
Connect reMarkable with your PC via a microUSB cable.
SSH to the device as user "root" using the password find in Preference > About. e.g. ssh [email protected]
Download "NotoSansCJK[you language]-Regular.otf" from *note, there is limited space on the device, so do not sue "Super OpenType/CFF Collection (Super OTC)", an language-specific OTC is ok.

The Skills Poor Programmers Lack

A friend and I had a discussion about the basic skills that are often lacking in experienced programmers. How can a programmer work for ten or twenty years and never learn to write good code? So often they need close supervision to ensure they go down the right path, and they can never be trusted to take technical leadership on larger tasks. It seems they are just good enough to get by in their job, but they never become effective.

We thought about our experiences and came up with three fundamental skills that we find are most often missing. Note that these are not skills which take a considerable amount of talent or unique insight. Nor are they "trends" or "frameworks" to help you get a new job. They are basic fundamentals which are prerequisites to being a successful programmer.

Understand how the language works

Programmers cannot write good code unless they understand what they are typing. At the most basic level, this means they need to understand the rules of

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>Taiwan</title>
	<style>
	.boundary {
	fill: none;
	stroke: #888;
	stroke-linejoin: round;

	<div>
	1.
	<svg id="bind1" width="650" height="190" style="background: lightgrey">

	<g transform="translate(150,0)">
	<g transform="translate(50,0)">
	<g transform="translate(10,10)">
	<rect x="4" y="24" width="72" height="140" rx="30"
	fill="rgb(179,230,255)" stroke="blue" />
	<g fill="none" stroke="black">

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8" />
	<script src="https://d3js.org/d3.v5.min.js"></script>
	</head>
	<body>
	<div>
	<svg
	id="key"

	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>Mexico</title>
	<style>
	.boundary {
	fill: none;
	stroke: #888;
	stroke-linejoin: round;


	$sname="w32time"

	#check if the service running
	if((Get-service $sname \| Where-Object {$_.status -eq "running"} ) -eq $Null){
	#Not Running, restart it
	Stop-service $sname
	Start-service $sname
	}
	sleep 30

	import java.nio.file.Files
	import java.nio.file.Path

	def getTempDirectory(prefix:String):String = {
	val path = Files.createTempDirectory(prefix)
	path.toString
	}