MarkZhangTW’s gists

MarkZhangTW / .vimrc

Last active August 6, 2021 23:17

My vimrc

	set background=dark
	set number
	highlight LineNr ctermfg=blue
	syntax on

	set tabstop=4
	set shiftwidth=4
	set expandtab
	set smarttab
	set autoindent

MarkZhangTW / cf.update.py

Created April 3, 2020 14:26

Update CloudFlare DDNS by Python

	#!/usr/bin/env python3
	import requests
	import json
	from datetime import datetime

	ip = requests.get('https://icanhazip.com').text.strip()

	cf_endpoint = 'https://api.cloudflare.com/client/v4/'
	cf_apitoken = 'Bearer <Your API Token>'
	# You can get <zone id> on CloudFlare dashboard

MarkZhangTW / curl.time.sh

Last active April 10, 2020 06:03

Curl format for displaying time infomation.

	#!/usr/bin/env bash
	# Reference: https://stackoverflow.com/questions/18215389/how-do-i-measure-request-and-response-times-at-once-using-curl
	curl_format="\
	%{time_namelookup}:\
	%{time_connect}:%{time_appconnect}:\
	%{time_pretransfer}:%{time_redirect}:\
	%{time_starttransfer}:%{time_total}"
	curl_result=$(echo "$curl_format" \| curl -s -o /dev/null -w @- $@)

	IFS=':' read -r -a array <<< "$curl_result"

MarkZhangTW / cow.find.js

Created April 12, 2020 07:28

Find the Invisible Cow Cheater

	var cow = document.querySelector('div.game')
	for (let y = 0; y < cow.clientHeight; y += 25)
	for (let x = 0; x < cow.clientWidth; x += 25)
	cow.dispatchEvent(new MouseEvent('click', {clientX: x, clientY: y}));

MarkZhangTW / JavaSerializationDemo.java

Created April 13, 2020 06:25

Demo of Java Serialization

	import java.io.ByteArrayInputStream;
	import java.io.ByteArrayOutputStream;
	import java.io.IOException;
	import java.io.ObjectInputStream;
	import java.io.ObjectOutputStream;
	import java.io.Serializable;
	import java.util.Base64;

	class JavaSerializationDemo {

MarkZhangTW / runPython.java

Created April 17, 2020 10:44

Run python script in Java in Windows

	public class App {

	public static void main(String[] args) throws IOException {
	final String result = runPython("script.py", "arg1", "arg2");
	System.out.println(result);
	}

	private static String runPython(String script, String... args) throws IOException {
	List<String> newArgs = new ArrayList<>();
	newArgs.add(script);

MarkZhangTW / failed.ip.sh

Last active May 18, 2020 01:37

	#sudo lastb -ai \| head -n-2 \| awk '{print$NF}' \| awk '/[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+/{print}' \| sort -t. -k1,1n -k2,2n -k3,3n -k4,4n \| uniq --count \| awk '$1>9{print$2}' > failed.ip.9
	sudo lastb -ai \| head -n-2 \| awk '{print$NF}' \| awk '/[0-9]+[.][0-9]+[.][0-9]+[.][0-9]+/{print}' \| sort \| uniq --count \| awk '$1>9{print$2}' > failed.ip.9
	for ip in $(cat failed.ip.9); do
	sudo firewall-cmd --permanent --zone=public --add-rich-rule="rule family='ipv4' source address='$ip' reject"
	done
	sudo firewall-cmd --reload

MarkZhangTW / fail2block.ip.txt

Last active August 9, 2020 10:12

A list of IPs that have tried to brute force login into my SSH server.

MarkZhangTW / .bashrc

Last active June 14, 2020 01:51

My bashrc

	# BUG: cursor will disappear after open tmux
	function cursor_green { printf '%b' '\e]12;green\a'; }
	# cursor_green
	# print escape character when login will cause SCP malfunction

	# SSH auto-reconnect
	# https://backreference.org/2013/04/26/ssh-auto-reconnect/
	function ssh {
	while true; do
	command ssh "$@";

MarkZhangTW / keybindings.js

Created May 22, 2020 05:31

My VS Code keybindings

	[
	// Clear terminal history buffer
	{ "key": "ctrl+l", "command": "workbench.action.terminal.clear", "when": "terminalFocus" },
	// Change ctrl+m from toggle tab focus mode to send carrage return
	{ "key": "ctrl+m", "command": "workbench.action.terminal.sendSequence", "when": "terminalFocus", "args": {"text":"\r"} },
	// Change ctrl+f from find to send acknowledgement character
	{ "key": "ctrl+f", "command": "workbench.action.terminal.sendSequence", "when": "terminalFocus", "args": {"text":"\u0006"} },
	]

Mark Zhang MarkZhangTW