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@crazy-max
crazy-max / release.yml
Created December 2, 2019 09:11
Workflow to release a GitHub Action
name: release
on:
push:
branches-ignore:
- '**'
tags:
- 'v*.*.*'
jobs:
@lizrice
lizrice / hello_map.py
Last active July 19, 2023 08:20
eBPF hello world
#!/usr/bin/python
from bcc import BPF
from time import sleep
# This outputs a count of how many times the clone and execve syscalls have been made
# showing the use of an eBPF map (called syscall).
program = """
BPF_HASH(syscall);
@bitinn
bitinn / .a-unity-git-config.md
Last active April 2, 2025 07:53
My Unity git config
@kerbeh
kerbeh / greenscren.md
Created September 25, 2018 00:17
Greenscreen chroma key with FFmpeg

##FFmpeg greenscreen process

ffmpeg -hwaccel videotoolbox -i background.jpg -i out.mp4 -filter_complex "[1:v]colorkey=0x34d454:0.3:0.15[ckout];[0:v][ckout]overlay[despill];[despill] despill=green[colorspace];[colorspace]format=yuv420p[out]" -map "[out]" output.mp4

###Explanation

*hwaccel enable hardware accelartion profile videotoolbok is avlaiable on my mac for this codec *-i is the input, the greenscreen video is second and the background image is first *-filter_complex chains up the filters in a string *colorkey provides the color of the green screen in hex, the threshold to match (higher is more) and the blend (higher is more)

@elnygren
elnygren / slackpost.sh
Last active March 28, 2022 00:25
Post to Slack webhook with curl & jq
#!/usr/bin/env bash
# CONFIG
URL="https://hooks.slack.com/services/..."
PAYLOAD='{
"channel": "#test",
"username": "Ghost",
"text": "no-message",
"icon_emoji": ":ghost:"
}'
@steven2358
steven2358 / ffmpeg.md
Last active May 5, 2025 07:54
FFmpeg cheat sheet
@Neo23x0
Neo23x0 / audit.rules
Last active March 11, 2025 10:24
Linux Auditd Best Practice Configuration
# IMPORTANT!
# This gist has been transformed into a github repo
# You can find the most recent version there:
# https://github.com/Neo23x0/auditd
# ___ ___ __ __
# / | __ ______/ (_) /_____/ /
# / /| |/ / / / __ / / __/ __ /
# / ___ / /_/ / /_/ / / /_/ /_/ /
# /_/ |_\__,_/\__,_/_/\__/\__,_/
@PeteGoo
PeteGoo / entrypoint-from-ssm-env-vars.sh
Last active February 13, 2023 10:51
Helpful SSM Parameter Store scripts
#!/bin/bash
# To use just set a variable with SSM_<target_env_var>=<ssm_parameter_store_path>
# e.g. SSM_database_password=prod/myservice/database-password
function get_parameter {
SSM_ENV_VAR_NAME=$1
ENV_VAR_NAME=`echo "$SSM_ENV_VAR_NAME" | cut -c5-`
SSM_PARAM_NAME="${!SSM_ENV_VAR_NAME}"

Thread Pools

Thread pools on the JVM should usually be divided into the following three categories:

  1. CPU-bound
  2. Blocking IO
  3. Non-blocking IO polling

Each of these categories has a different optimal configuration and usage pattern.

@andkirby
andkirby / slack.sh
Last active February 10, 2025 18:49
Shell/Bash script for sending slack messages.
#!/usr/bin/env bash
####################################################################################
# Slack Bash console script for sending messages.
####################################################################################
# Installation
# $ curl -s https://gist.githubusercontent.com/andkirby/67a774513215d7ba06384186dd441d9e/raw --output /usr/bin/slack
# $ chmod +x /usr/bin/slack
####################################################################################
# USAGE
# Send message to slack channel/user