Nisanth Chunduru nisanthchunduru

Structs & functions

#include <stdio.h>
#include <string.h>

int stringsTotalLength(char* firstString, char* secondString) {
  int totalLength = strlen(firstString) + strlen(secondString);
  return totalLength;
}

Better SSH Authorized Keys Management

A seemingly common problem that people encounter is how to handle all of your users authorized_keys file.

People struggle over management, ensuring that users only have specific keys in the authorized_keys file or even a method for expiring keys. A centralized key management system could help provide all of this functionality with a little scripting.

One piece of functionality overlooked in OpenSSH is the AuthorizedKeysCommand configuration keyword. This configuration allows you to specify a command that will run during login to retrieve a users public key file from a remote source and perform validation just as if the authorized_keys file was local.

Here is an example directory structure for a set of users with SSH public keys that can be shared out via a web server:

	kamal deploy
	Log into image registry...
	INFO [43ba0482] Running docker --version && docker buildx version as chunisan@localhost
	INFO [43ba0482] Finished in 0.263 seconds with exit status 0 (successful).
	INFO [78be9720] Running docker login -u [REDACTED] -p [REDACTED] as chunisan@localhost
	INFO [78be9720] Finished in 3.187 seconds with exit status 0 (successful).
	INFO [335cb57f] Running docker login -u [REDACTED] -p [REDACTED] on 150.136.2.200
	INFO [335cb57f] Finished in 3.772 seconds with exit status 0 (successful).
	Build and push app image...
	INFO [57fe232e] Running docker --version && docker buildx version as chunisan@localhost

	// TODO: Migrate to AWS Node SDK V3
	const AWS = require('aws-sdk');
	const cloudformation = new AWS.CloudFormation()async function disableTerminationProtection(stackNames) {
	for (const stackName of stackNames) {
	try {
	await cloudformation.updateTerminationProtection({
	EnableTerminationProtection: false,
	StackName: stackName,
	}).promise();
	console.log(`Termination protection disabled for stack ${stackName}`);

	# This program was generated by ChatGPT

	import numpy as np

	# Sigmoid activation function
	def sigmoid(x):
	return 1 / (1 + np.exp(-x))

	# Derivative of the sigmoid function
	def sigmoid_derivative(x):

	# In config/application.rb

	class ResponseLogger
	def initialize(app)
	@app = app
	end

	def call(env)
	headers = env.select {\|k,v\| k.start_with? 'HTTP_'}
	.map {\|pair\| [pair[0].sub(/^HTTP_/, ''), pair[1]].join(": ")}

	# send email using STARTTLS; Net::SMTP#enable_starttls requires ruby >=1.8.7
	# this hack is needed for rails <2.3; apparently >=2.3 has something for this already

	ActionMailer::Base.class_eval do
	private
	def perform_delivery_smtp(mail)
	destinations = mail.destinations
	mail.ready_to_send

	smtp = Net::SMTP.new(smtp_settings[:address], smtp_settings[:port])

	#! /bin/sh
	### BEGIN INIT INFO
	# Provides: redis-server
	# Required-Start: $syslog $remote_fs
	# Required-Stop: $syslog $remote_fs
	# Should-Start: $local_fs
	# Should-Stop: $local_fs
	# Default-Start: 2 3 4 5
	# Default-Stop: 0 1 6
	# Short-Description: redis-server - Persistent key-value db

	{
	"_json" => [{
	"email" => "lovis@tinybuddy.se",
	"timestamp" => 1540907117,
	"status" => "4.3.0",
	"reason" => "maildrop: maildir over quota.",
	"sg_message_id" => "kxRB0RumSp6z8tkmLZnUMQ.filter0176p3mdw1-22850-5BD1C50F-7C.0",
	"sg_event_id" => "QcLgvoOaRWCXLZ72J-lf1g",
	"type" => "blocked",
	"event" => "bounce"