gzxu

device=sdb
serial="$(ls -la /dev/disk/by-id | grep "/$device\$" | sed 's/ /\n/g' | grep ata | sed 's/_/\n/g' | tail -n1)"
read -r -s password
hashed=$(SERIAL="$serial" PASSWORD="$password" python3 -c 'import hashlib, base64, os; print(base64.b64encode(hashlib.pbkdf2_hmac("sha1", os.environ["PASSWORD"].encode(), os.environ["SERIAL"].ljust(20, " ").encode(), 75000, 32)).decode())' | base64 -d)
sudo sedutil-cli -n --listLockingRanges "$hashed" /dev/$device

rojenzaman

#!/bin/bash

if [ "$#" -lt 4 ]; then
    echo "`basename $0` <mysql-root-passwd> <db user> <ip> <db password>";
    exit 1;
fi

mysql --user=root --password=$1 <<EOF
CREATE DATABASE wordpress;
CREATE USER '$2'@'$3' IDENTIFIED BY '$4';

vms20591

Pre-Requisites

1. Arch Linux iso
2. Virtualbox
3. Two virtual HDDs - 8G (main) & 1G (detached header & boot) respectively

Preparing the disks

Step 1

hum4n0id

• Gstreamer Pipeline Samples
  • Video
    • display test video
    • record to file
    • record and display at the same time(queue)
    • record webcam to *.mp4(jetson nano)
    • fps test
  • Audio
  • Mux Video and Audio
• Media File

coldfix

Recovering deleted files in Ubuntu with ext4 filesystem

Recently, I deleted some files by mistake in a Ubuntu machine with an ext4 fs. These notes document the steps I took to get them back.

Important

• this procedure assumes that the partition that contained the deleted files is different from the root partition, as that was the scenario with which I had to deal (deleted files were in my home dir). The procedure needs that the partition that contained the files is unmounted, so if the deleted files were in the root partition, the process would be a bit different (e.g. storing the fs journal in a USB stick, using a live CD/USB to boot and issue the commands, etc.)
• if something is not clear, you need more information, etc. check the sources below

With that out the way, let's begin.

rojenzaman

location = /404.html {
        root /usr/share/nginx/error;
}
error_page 404 /404.html;

location = /50x.html {
        root /usr/share/nginx/error;
}
error_page 500 502 503 504 /50x.html;

Jiab77

Create DNS-over-TLS bridge with unbound, stubby and systemd on Ubuntu Server 18.04

This gist will explain how to create a DNS-over-TLS bridge for the local network.

The server part will be based on: https://dfarq.homeip.net/dns-over-tls-protect-your-network-with-ubuntu/.

Server

Install required packaages:

Jiab77

Setup DNS-over-TLS with systemd on Ubuntu 18.04

This gist will explain how to setup DNS-over-TLS on your local computer.

Verify systemd version

To make it work, you need at least systemd version 237 or 242.

I'll use the version 242 in this gist.

marcduiker

Convert pngs to mp4

This FFmpeg command reads images named frame_[4 char digit].png and converts it to an mp4 using the h264 encoding which Twitter accepts. The bitrate is set to 5M to reduce blocking as much as possible while keeping the size small.

ffmpeg -framerate 10 -i frame_%04d.png -c:v h264_qsv -b:v 5M video.mp4

Convert and scale an existing mp4 to 1080:

ffmpeg -i input.mp4 -c:v h264_qsv -vf: scale=1080:-1 -b:v 5M output.mp4

zthxxx

# find merge-request which contains commit in GitLab
# https://gitlab.com/gitlab-org/gitlab-foss/-/issues/28037
# https://stackoverflow.com/a/17819027/7277090

git config --add remote.origin.fetch '+refs/merge-requests/*/head:refs/remotes/origin/merge-requests/*'
git fetch origin

git for-each-ref --contains <hash> | grep merge-requests | head -n 10