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Ritiek Malhotra ritiek

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@antifuchs
antifuchs / boot-unlock.nix
Created September 12, 2022 19:40
# To set this up, first get tailscale working in an isolated linux shell:
# 1. sudo systemctl stop tailscaled.service
# 2. tailscaled -port 9993 -state tailscale-luks-setup.state -tun userspace-networking -socket ./tailscaled.sock
# 3. tailscale -socket ./tailscaled.sock up -hostname HOSTNAME-luks
# 4. tailscale -socket ./tailscaled.sock down
# 5. ctrl-c out of tailscaled
# 6 sudo systemctl start tailscaled.service
#
# Then add the .state file to your machine secrets and pass its path as tailscaleStatePath.
@Kranzes
Kranzes / guide.md
Last active April 24, 2025 04:55
SSH Resident Key Guide

Initial checks

Start by checking that there aren't any previous ssh keys inside the FIDO2 authenticator of your YubiKey. You can check if they exist by running the command below:

nix shell nixpkgs#yubikey-manager -c ykman fido credentials list

If the command above outputs a string mentioning "ssh" or "openssh", then you have already got a key generated and store on your YubiKey.

Evaluating additional authentication factors

Before generating a new ssh key to store on your YubiKey you must consider which additional required authentication factors you want to use. Below you can see a table with the available factors and their corresponding command:

@brunoanc
brunoanc / screen-sharing-hyprland.md
Last active April 24, 2025 05:34
Screen sharing on Hyprland (Arch Linux)
@nitred
nitred / optimal_mtu.md
Last active April 24, 2025 19:08
Wireguard Optimal MTU

About

  • I faced bandwidth issues between a WG Peer and a WG server. Download bandwidth when downloading from WG Server to WG peer was reduced significantly and upload bandwidth was practically non existent.
  • I found a few reddit posts that said that we need to choose the right MTU. So I wrote a script to find an optimal MTU.
  • Ideally I would have liked to have run all possible MTU configurations for both WG Server and WG Peer but for simplicity I choose to fix the WG Server to the original 1420 MTU and tried all MTUs from 1280 to 1500 for the WG Peer.

Testing

  • On WG server, I started an iperf3 server
  • On WG peer, I wrote a script that does the following:
    • wg-quick down wg0
  • Edit MTU in the /etc/wireguard/wg0.conf file
@sm-Fifteen
sm-Fifteen / whats_a_yubikey.md
Last active April 10, 2025 19:05
"What the heck is a Yubikey and why did I buy one?": A user guide

"What the heck is a Yubikey and why did I buy one?": A user guide

(EDIT: Besides Reddit, I've also put this up on Github Gist)

So while looking for information on security keys before getting one myself, I got very confused reading about all the different modes and advertised features of Yubikeys and other similar dongles. The official documentation tends to be surprisingly convoluted at times, weirdly organized and oddly shy about a few of the limitations of these keys (which I'm making a point of putting front and center). Now that I have one, I decided to write down everything I figured out in order to help myself (and hopefully some other people reading this) make sense of all this.

Since I'm partly writing these notes for myself, there might be some back and forth between "exp

@fern9001
fern9001 / nixos-vim-guide.md
Last active November 9, 2024 11:57
Fern's NixOS Vim Guide

Fern's NixOS Vim Guide

A newbie friendly guide to configuring Vim in NixOS

File Structure

Create the following file struture in /etc/nixos

/etc/nixos
    |-- apps
        |-- vim
            |-- default.nix 
            |-- vimPlugins.nix
@approovm
approovm / 00-android-bypass-certificate-pinning-and-mitm-attack-setup.md
Last active April 18, 2025 18:03
Certificate Pinning Bypassing: Setup with Frida, mitmproxy and Android Emulator with a writable file system
@z11i
z11i / upload.sh
Last active November 16, 2024 22:05
Use curl to upload a file in a multipart/form-data request, with custom content-type for the file (not the request)
filename='yourfilename'
filetype='text/csv'
token='my oauth token'
url='http://localhost/upload'
curl "$url" \
--form "data=@$filename;type=$filetype" \
--form "name=somename" \
-H "Authorization: Bearer $token"
@en4rab
en4rab / WiFi-Lightbulb.md
Last active April 1, 2025 18:25
Flashing an unbranded smart lightbulb to Tasmota

Flashing an unbranded smart lightbulb to Tasmota

Whilst on holiday last week I thought i would do something productive but that seemed like work so I bought some cheap noname wi-fi smart LED lighbulbs off ebay and flashed them with Tasmota firmware, since the particular bulb I bought wasnt listed on the Tasmota Device Templates Repository and I have no idea if they accept an entry for a bulb with no identifying marks I thought i'd put something here incase its of use to anyone.

Reliability: I have at this point had 10 of these bulbs running for about a week, one of them has just died.

TL;DR

The pinout and device string for this light:

  • GPIO4 Cold White PWM 4
@tykurtz
tykurtz / grokking_to_leetcode.md
Last active April 26, 2025 10:36
Grokking the coding interview equivalent leetcode problems

GROKKING NOTES

I liked the way Grokking the coding interview organized problems into learnable patterns. However, the course is expensive and the majority of the time the problems are copy-pasted from leetcode. As the explanations on leetcode are usually just as good, the course really boils down to being a glorified curated list of leetcode problems.

So below I made a list of leetcode problems that are as close to grokking problems as possible.

Pattern: Sliding Window