January 17, 2025 Reading time: 2 minutes

DNS queries using Systemd Resolver can be difficult to grasp at the begining. Here are some commands that can help you understand how Systemd Resolver works under the hood.

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December 22, 2024 Reading time: ~1 minute

pdftoppm -jpeg -r document.pdf doc_image

November 23, 2024 Reading time: ~1 minute

Install sox program

sudo apt install sox

Open the terminal and execute the following command. Your audio will be saved in a new file named "test.wav"

sox -t alsa default test.wav

November 23, 2024 Reading time: 2 minutes

A Python program to save your routing table into a Batch script as a backup. You can also execute the script into another system for fast configuration or automation. The program will generate a new file under the same directory of the program with a name "network.save" that contains the script.

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November 10, 2024 Reading time: ~1 minute

ffmpeg -i broken.mp4 -c:v libx264 -profile:v baseline -level 3.0 -pix_fmt yuv420p working.mp4

November 9, 2024 Reading time: ~1 minute

Generate key

openssl genrsa -des3 -out server.key 2048

Generate certificate

openssl req -new -key server.key -sha256 -out server.csr

Sign the certificate

openssl x509 -req -days 365 -in server.csr -signkey server.key -sha256 -out server.crt

November 9, 2024 Reading time: ~1 minute

A command to convert a video to a format suitable for Plex directly play (no overhead transcode performed by Plex to play the video)

ffmpeg -i inputvideo.mkv -crf 18 -map 0 -acodec copy -scodec copy -c:v libx264 -threads 0 -preset veryslow outputfile.mkv