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@jwbee
jwbee / jq.md
Last active April 27, 2025 11:31
Make Ubuntu packages 90% faster by rebuilding them

Make Ubuntu packages 90% faster by rebuilding them

TL;DR

You can take the same source code package that Ubuntu uses to build jq, compile it again, and realize 90% better performance.

Setting

I use jq for processing GeoJSON files and other open data offered in JSON format. Today I am working with a 500MB GeoJSON file that contains the Alameda County Assessor's parcel map. I want to run a query that prints the city for every parcel worth more than a threshold amount. The program is

Copyright© Technovelgy LLC; all rights reserved.
Name Purpose Author (Publication Date) Category
Andy - an artificial human A slang term for "android" - an artificially created humanoid being. Philip K. Dick (1968) ai
Autobutle An automated servant. Frank Herbert (1972) ai
Automaton Chessplayer - the first chess-playing computer The first chess-playing computer. Ambrose Bierce (1910) ai
Automonk A robot with an AI trained on an individual monk. Ray Naylor (2022) ai
Ava - she wants to be taught A piece of learning software. Amitav Ghosh (1995) ai
Bard A machine that invents randomized stories and can read them out loud or animate them for viewing. Isaac Asimov (1956) ai
Bendix Anxiety Reducer Machine-based psychotherapy. Robert Sheckley (1956) ai
Big Computer - wide-screen Jehovah Just like it says; this computer knows it all. John Varley (1983) ai
@chapmanjacobd
chapmanjacobd / gitls.md
Last active December 1, 2023 05:09
a few interesting git commands

gitls

git ls-files --sparse --full-name -z | 
  xargs -0 -I FILE -P 20 git log --date=iso-strict-local --format='%ad %>(14) %cr %<(5) %an  %h ./FILE' -- FILE | 
  sort --general-numeric-sort

This lists the files and hashes for each git commit and file:

2021-12-05T13:32:32-06:00  1 year, 11 months ago  Jacob Chapman  cc91fa0 ./.gitattributes

2021-12-05T13:32:32-06:00 1 year, 11 months ago Jacob Chapman cc91fa0 ./.gitignore

@cstanze
cstanze / README.md
Last active March 2, 2025 07:39
eduroam / Legacy WPA2 Enterprise fix for NetworkManager on Linux.

Big thanks to:

Assume you've diagnosed the problem with journalctl -xb and come across something similar to:

Oct 18 09:51:58 florence wpa_supplicant[7999]: SSL: SSL3 alert: write (local SSL3 detected an error):fatal:protocol version
Oct 18 09:51:58 florence wpa_supplicant[7999]: OpenSSL: openssl_handshake - SSL_connect error:0A000102:SSL routines::unsupported protocol
Oct 18 09:51:58 florence wpa_supplicant[7999]: wlo1: CTRL-EVENT-EAP-FAILURE EAP authentication failed
@ChristopherA
ChristopherA / yt-dlp-tips.md
Last active April 5, 2025 10:42
yt-dlp tips

yt-dlp

A youtube-dl fork with additional features and fixes. Download videos from YouTube and other websites. More information at https://github.com/yt-dlp/yt-dlp

  • Download a video or playlist (with the default options from command below):
yt-dlp "https://www.youtube.com/watch?v=oHg5SJYRHA0"
@rbitr
rbitr / random_notes.md
Last active November 10, 2023 16:34
Confusion about using $RANDOM to generate random numbers

Random numbers in bash et al

There is a variable $RANDOM than you can read in bash or zsh to get a random number beteen 0 and 32767. Here in zsh on my (old) mac:

% echo $RANDOM
13757
% echo $RANDOM
16896
@ThomasFrans
ThomasFrans / git-worktree.md
Last active March 21, 2025 03:25
A gentle introduction to Git worktree

A Gentle Introduction to Git Worktree

Git worktree has become a major part of how I use Git over the past year. Anytime I mention it somewhere however, I get reactions from people who have never heard about the feature. Others have heard about it, but don't know how exactly it works or why it's beneficial. That's why I decided to write a short tutorial/introduction on this awesome feature that is baked right into the very git you are already using. I hope this can help people discover worktrees and be a gentle introduction on how to get started using them.

What is Git worktree

Git worktree facilitates working with multiple branches. In a normal Git workflow, you can only ever have one branch checked out at a single time.

@huytd
huytd / wordle.md
Last active April 1, 2025 00:28
Wordle in less than 50 lines of Bash

image

How to use:

./wordle.sh

Or try the unlimit mode:

@SwitHak
SwitHak / 20211210-TLP-WHITE_LOG4J.md
Last active April 28, 2025 21:31
BlueTeam CheatSheet * Log4Shell* | Last updated: 2021-12-20 2238 UTC

Security Advisories / Bulletins / vendors Responses linked to Log4Shell (CVE-2021-44228)

Errors, typos, something to say ?

  • If you want to add a link, comment or send it to me
  • Feel free to report any mistake directly below in the comment or in DM on Twitter @SwitHak

Other great resources

  • Royce Williams list sorted by vendors responses Royce List
  • Very detailed list NCSC-NL
  • The list maintained by U.S. Cybersecurity and Infrastructure Security Agency: CISA List