Guo Qiao guoqiao

on AWS, you may see some instance types have instance storage attr with it. E.g.:

g4dn.xlarge	1	4	16	1 x 125 NVMe SSD --> Instance Storage in GB

This means, when you boot a instance with this type, you will have 2 volumes attached:

boot volume, default 8G, system installed on it
instance storage volume, 125G, or 116.4Gi, spare, not in use by default.

Linux

On Linux, tmpfs == shm == shared memory.
you can mount tmpfs to a dir, and use that dir as normal dir but super fast.
Default path is at /dev/shm/.

when you create a file there, it actually lives in memory. Thus, it will be super fast to read/write, and applications/processes can use it to communicate.

By default, the size limit of /dev/shm is half of your physical memory. E.g.: my linux PC has 32G mem:

usage syntax:

ffmpeg input(s) [codec options] output(s)

convert video format:

ffmpg -i input.mov -c copy output.mp4

include .env and use envvar:

in your .env:

foo=bar

in your Makefile:

include .env

create db and user:

app=$1

dbuser=$app
dbname=$app

sudo su --login postgres << EOF

createuser --echo ${dbuser};

from pathlib import Path

FILE = Path(__file__).resolve()
NAME = FILE.stem
HERE = FILE.parent

Setup PyTorch with CUDA in WSL-Ubuntu on Windows 11

On Windows 11:

Download and install Nvidia GPU Driver for Windows: https://www.nvidia.com/download/index.aspx
Download and install CUDA Toolkit for Windows: https://developer.nvidia.com/cuda-downloads

NOTE: Nvidia Official doc says, the GPU Driver includes "CUDA Support", which is very confusing. It doesn't mean CUDA is included in Driver. What included is only some support files, not CUDA itself. You still need to install CUDA separately.

	#!/usr/bin/env ansible-playbook
	---
	- hosts: localhost
	gather_facts: no
	tasks:
	- name: sleep 10s
	command: "sleep 10"
	loop: "{{range(3)\|list}}"
	async: 11
	poll: 0

	provider "aws" {
	region = "us-east-1"
	}

	resource "aws_s3_bucket" "bucket" {
	# change this to your own bucket name
	bucket = "my-test-bucket"
	# allow to destroy bucket even when not empty
	force_destroy = true
	}

	// ==UserScript==
	// @name LinkedIn Improve
	// @namespace http://tampermonkey.net/
	// @version 2024-02-28
	// @description try to take over the world!
	// @author You
	// @match https://www.linkedin.com/messaging/thread/*
	// @icon https://www.google.com/s2/favicons?sz=64&domain=linkedin.com
	// @grant GM_addStyle
	// ==/UserScript==