Xuanliang Cui Yaoshicn

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

Installing Arch Linux on VirtualBox in Windows 10

I recently upgraded to a new system, and instead of running Arch Linux natively I've decided to run it inside VirtualBox on Windows 10. Below I note down the steps I took, which closely follow the excellent wiki pages of archlinux. But along the way, I also noted a few other steps steps I took to make this system very comfortable, which you'll have to figure out for yourself if you like them or not!

Setting up Windows 10 to be ready

There isn't much of preparation required, given that I started from scratch, but I did have to setup my windows environment a little bit.

Install the windows package manager chocolatey
Install qBittorrent (which will be used to download an iso copy of arch) by running the following command from the command line choco install qbittorrent (recommended to run the command line as an adm

[email protected]:~$ sudo dd bs=1m if=/Users/jamesmead/Downloads/2015-02-16-raspbian-wheezy.img of=/dev/disk2

pi@raspberrypi ~ $ sudo raspi-config
# Choose option 1 to "Expand Filesystem" - Ensures that all of the SD card storage is available to the OS
# Choose Finish & reboot

pi@raspberrypi ~ $ sudo apt-get update

Intro

The plan is to create a pair of executables (ngrok and ngrokd) that are connected with a self-signed SSL cert. Since the client and server executables are paired, you won't be able to use any other ngrok to connect to this ngrokd, and vice versa.

DNS

Add two DNS records: one for the base domain and one for the wildcard domain. For example, if your base domain is domain.com, you'll need a record for that and for *.domain.com.

	#/usr/bin/env python
	# coding=utf-8

	import random
	import re


	def color(messages):
	color = '\x1B[%d;%dm' % (1,random.randint(30,37))
	return '%s %s\x1B[0m' % (color,messages)

	#!/bin/bash

	function __main__(){
	BACKUP_DIR=${HOME}/.autobackup
	local op=${1}
	shift

	case ${op} in
	"init")
	init ${@}

	# https://stackoverflow.com/questions/25191620/
	# creating-lowpass-filter-in-scipy-understanding-methods-and-units

	import numpy as np
	from scipy.signal import butter, lfilter, freqz
	from matplotlib import pyplot as plt


	def butter_lowpass(cutoff, fs, order=5):
	nyq = 0.5 * fs

	#!/usr/bin/env python
	# coding=utf8
	# author=evi1m0
	# website=linux.im

	'''
	12306 Captcha Picture:
	author: Evi1m0@20150316
	1. Download Captcha
	2. Pic Conver Text

	good, 你已经有了一个自己的shadowsocks代理了，现在想要把这个代理公布出去给所有人分享。
	但是没有两个小时，代理就没法使用了，为什么？因为你需要额外注意以下事项（以下步骤需要比较高的linux技能）
	本文只关注于确保shadowsocks服务还“活着”，如果你希望让其跑得更快，请参考
	https://github.com/clowwindy/shadowsocks/wiki/Optimizing-Shadowsocks

	1、 shadowsocks的timeout设置
	超时时间越长，连接被保持得也就越长，导致并发的tcp的连接数也就越多。对于公共代理，这个值应该调整得小一些。推荐60秒。

	2、检查操作系统的各种限制
	对于openvz的vps，特别需要检查一下