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Bash string manipulation cheatsheet

Assignment
Assign `value` to `variable` if `variable` is not already set, `value` is returned. Combine with a `:` no-op to discard/ignore return `value`.	`${variable="value"}` `: ${variable="value"}`

##分布式系统(Distributed System)资料

介绍:这是一篇介绍在动态网络里面实现分布式系统重构的paper.论文的作者(导师)是MIT读博的时候是做分布式系统的研究的,现在在NUS带学生,不仅仅是分布式系统,还有无线网络.如果感兴趣可以去他的主页了解.

A common and reliable pattern in service unit files is thus:

NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
DevicePolicy=closed
ProtectSystem=strict

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Vertical Bar with Images</title>
	<style>
	body {
	display: flex;
	justify-content: center;

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Vertical Bar with Images</title>
	<style>
	body {
	display: flex;
	justify-content: center;

	0000:006f JessTechColourRumblePad
	0001:0329 Sl6566
	0005:05ac Mocute
	0010:0082 AkishopCustomsPs360Plus
	0078:0006 MicrontekUsbJoystick
	0079:0006 PcTwinShock
	0079:0011 DragonRiseGamepad
	0079:1800 MayflashWiiUProAdapter
	0079:181a VenomLimitedArcadeJoystick
	0079:181b VenomArcadeJoystick

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Vertical Bar with Images</title>
	<style>
	body {
	display: flex;
	justify-content: center;

	# This setup works pretty well for OPL with a network link that travels through
	# two UniFi switches and connects to a Samba server running inside Docker. The
	# host OS is Debian with a ZFS filesystem and the container OS is also Debian.
	# Latest Samba (4.11+).

	[global]
	# ======================
	# General Samba settings
	# ======================
	log level = 1