ffosilva

Docker Engine on WSL2

This tutorial contains instructions to install Docker Engine (not Docker Desktop) on WSL2 distribution. For instance, an Ubuntu 22.04 distribution will be used.

Uninstall any Docker version

Make sure you have fully uninstalled any versions of Docker. The instructions to uninstall can be found here.

Installation, starting and testing

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1.) Download a Nerd Font

2.) Unzip and copy to ~/.local/share/fonts

3.) Run the command fc-cache -fv to manually rebuild the font cache

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-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

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Setting up a Linux Hyper-V VM on Windows with SGX Support

Note: Hyper-V support for SGX is not yet fully supported, but can be used as a "Preview" with the limitations mentioned below.

To set up a Linux VM on your Windows machine, do the following:

1. Download an ISO for Ubuntu 18.04 or 16.04. A "Server install image" is sufficient.
2. Create a VM as follows. Open "Hyper-V Manager", and do Action -> New -> Virtual Machine....

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exemplo = [
    [1, 2, 3],
    [1, 3, 4, 5],
    [6, 8, 9, 10],
    [12, 13, 15],
    [17],
    [23, 24]
]

def __next(grupos, pos):

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// build using `g++ -fno-elide-constructors rule_of_five.cpp`

#include <stdlib.h>
#include <iostream>

class MyMovableClass
{
private:
    int _size;
    int *_data;

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# by joevt Jul 7, 2020

#=========================================================================================
#           
#           
#           Thunderbolt DROM Notes:
#           
#           
#           https://lore.kernel.org/patchwork/patch/714766/
#           

ffosilva

Convert sequence of JPEG images to MP4 video

ffmpeg -r 24 -pattern_type glob -i '*.JPG' -i DSC_%04d.JPG -s hd1080 -vcodec libx264 timelapse.mp4

• -r 24 - output frame rate
• -pattern_type glob -i '*.JPG' - all JPG files in the current directory
• -i DSC_%04d.JPG - e.g. DSC_0397.JPG
• -s hd1080 - 1920x1080 resolution

Slower, better quality

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#!/bin/bash
function show_help() {
    echo -e "$0 - Generate x509 CA certificate/keys\n"
    echo -e "Before start using this script, you should define the following environment variables:"
    echo -e "CERT_C     - Country Name (C): Use the two-letter code without punctuation for country"
    echo -e "CERT_S     - State or Province (S): Spell out the state completely; do not abbreviate the state or province name"
    echo -e "CERT_L     - Locality or City (L): The Locality field is the city or town name"
    echo -e "CERT_O     - Organization (O): Your company or department"
    echo -e "CERT_OU    - Organizational Unit (OU): This field is the name of the department or organization unit making the request."
    echo -e "CERT_CN    - Common Name (CN): The Common Name is the Host Name or Domain Name. Example \"www.domain.com\" or \"domain.com\".\n           In Kafka domain, commonly, this field is filled with Kafka username (to use with ACLs)."

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How to use

Just set PUSHBULLET_TOKEN environment variable with your API token and run:

$ ./send-pushbullet-message.sh "message title" "message content"