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Today I learned

This is just a list of posts were I keep track of my progress as a user of this digital age. Anything that I found interesting and useful I write down. Hopefully, that as the years go by, I can have a nice collection of TILs.

ansible

Escape square brackets

aws

Smarter way of hanlding dns updates

ctf

CTF links

devops

Hermetic Trusting cURL with Self Signed Certs Devops Terminology

docker

Docker User in Containers Obtain the keys for "--format" flag Docker build kit Re-tagging a docker image Docker data directory Docker network open ports Docker volumes

firefox

Disable sharing scree privacy indicator Disable Webrtc

firewall

rpfilter

foxdot

Starting foxdot on load

git

Grep commit changes Comparing commits to master Pulling submodules again

go

Error Chains Server Mux Interface signature for Function Check if bit is on Mutex and locking Defer, panic, and recover Arrays and slices Byte handling Concurrency is not parallelism Convert rune to int Dictionaries golang Reading strings from io String format padding

gpg

GPG Key flag subtype Backing up gpg keys Basic gpg functions Exporting gpg keys

javascript

Number constructor Replace regex

jq

JQ tricks

kubernetes

Labels and selectors

linux

Linux show verbose log zpool encryption Mounting zfs Looking at boot logs Ulimit values Linux network namespace Linux dns config Flush dns Makefile VPATH Merge jsons

macos

using `dd` with macos

markdown

Collapse markdown

nginx

Diffie–Hellman nginx

nix

Dirty Git tree

nixos

Linux Builder Darwin lost connection Nix fileSytem mounting by gid Propagating flake inputs IFD (Import From Derivation) C_INCLUDE_PATH vs CPLUS_INCLUDE_PATH Home Manager Nix Repl + Flakes Flake Inputs URL spec buildInputs vs nativeBuildInputs Completely offline nix store User Groups with NixOS Reducing internet download of nix flakes Using the nixpkgs packages Clang llvm Calculating Nix Hash Declaring NixOS modules gotchas Development libraries in Nix installing build output Custom Nixpkgs Get a derivation from a store path NixOS Generation Updating Niv Environment vars in nix shell

pacman

List files installed by package

postgres

Encode Postgres Buffer bytea1

qemu

Escape mouse capture

react

Managing state with React

rust

Unwrap vs Expect Structs Arrays Expressions VS Statements Iterators Shadowing a variable Slices

sql

SQL lite Litestream Lessons from Khan academy

ssh

Calculate sha256 ssh key fingerprint Do not add host key to `~/.ssh/known_hosts`

standards

UTF8 bit sequences

systemd

systemd-analyze security <name>.service

taskwarrior

Colors for different task Recurring tasks

vim

Maximize window Wrapping multiline in " (or any character) Select column vertically CoC keyboard shortcuts Write as sudo