Shabbir Hasan ShabbirHasan1

Collection of sysctl networking notes

List & reloading changes
Summary details of each connection status
Settings tweaking in /etc/sysctl.conf
- Detailed setting notes
- Control TIME_WAIT and connection tracking timeouts
Miscellaneous
- Nginx Plus additions
Further reading

CORS Proxies (Updated 2025)

Free

Proxy (A-Z)	Methods	Status Code	Override Headers	Exposed Headers	Follow Redirect	Timeout	Size Limit	Rate Limit
allorigins	✅ All	❌ (Always 200)	❌	❌	✅	❔	❔	20/min
cloudflare-cors-anywhere	✅ All	✅ Mirror	✅	✅	❌	❔	❔	❔
codetabs	❌ (only GET)	❌ (Always 200)	❌	❌	✅	❔	625KB	5/sec
cors-anywhere (heroku)	✅ All	✅ Mirror	❔	✅	✅ (max. 5)	❔	❔	50/hour

Performance Engineering, Hardware and cache awareness with algorithm and data structures

Parallel Computing Course - Stanford CS149, Fall 2023
Performance-Aware Programming Series by Casey Muratori
Algorithms for Modern Hardware
Computer Systems: A Programmer's Perspective, 3/E - by Randal E. Bryant and David R. O'Hallaron, Carnegie Mellon University
Performance Engineering Of Software Systems - am MITOCW course
Parallel Programming 2020 by NHR@FAU
Cpu Caches and Why You Care - by Scott Meyers

I've been writing Rust full-time with a small team for over a year now. Throughout, I've lamented the lack of clear best practices around defining error types. One day, I'd love to write up my journey and enumerate the various strategies I've both seen and tried. Today is not that day.

Today, I want to reply to a blog post that almost perfectly summarised my current practice.

Go read it; I'll wait!

How to get Telegram Bot Chat ID

Content :

Create a Telegram Bot and get a Bot Token
Get Chat ID for a Private Chat
Get Chat ID for a Channel
Get Chat ID for a Group Chat
Get Chat ID for a Topic in a Group Chat

	sysctl -w fs.file-max=12000500
	sysctl -w fs.nr_open=20000500
	ulimit -n 4000000
	sysctl -w net.ipv4.tcp_mem='10000000 10000000 10000000'
	sysctl -w net.ipv4.tcp_rmem='1024 4096 16384'
	sysctl -w net.ipv4.tcp_wmem='1024 4096 16384'
	sysctl -w net.core.rmem_max=16384
	sysctl -w net.core.wmem_max=16384
	wget http://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb
	sudo dpkg -i erlang-solutions_1.0_all.deb

	# Kernel sysctl configuration file for Linux
	#
	# Version 1.12 - 2015-09-30
	# Michiel Klaver - IT Professional
	# http://klaver.it/linux/ for the latest version - http://klaver.it/bsd/ for a BSD variant
	#
	# This file should be saved as /etc/sysctl.conf and can be activated using the command:
	# sysctl -e -p /etc/sysctl.conf
	#
	# For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and sysctl.conf(5) for more details.

	from typing import AsyncIterator

	import pyarrow as pa


	class AsyncMessageReader(AsyncIterator[pa.Message]):
	"""Wraps an async iterable of bytes into an async iterable of PyArrow IPC messages.

	From this it is possible to build an AsyncRecordBatchStreamReader.
	"""

	#![feature(backtrace)]

	extern crate thiserror;

	use thiserror::Error;
	use std::backtrace::Backtrace;

	#[derive(Error, Debug)]
	pub enum DataStoreError {
	//#[error("data store disconnected")]

	console.log('Loading event');

	// Twilio Credentials
	var accountSid = '';
	var authToken = '';
	var fromNumber = '';

	var https = require('https');
	var queryString = require('querystring');