Author Archives: Silver Moon

About Silver Moon

A Tech Enthusiast, Blogger, Linux Fan and a Software Developer. Writes about Computer hardware, Linux and Open Source software and coding in Python, Php and Javascript. He can be reached at [email protected].

Phoodle Hint and Answer for Today – 13th March, 2024

By | March 13, 2024

Solution and Fun Fact Today on 13th March 2024, the answer for Phoodle puzzle game is: NECCO And following is the interesting fact about it. PHOODLE FACT Necco wafers are “those barely flavored, pastel-colored, vaguely religious-looking chalky disks,” Sadie Green quipped in the best-selling book “Tomorrow and Tomorrow and Tomorrow” It refers to a book… Read More »

How to setup OpenDKIM with Postfix on Ubuntu / Debian

By | November 20, 2023

If you are sending or forwarding emails from your own server, then it is very important and nearly mandatory to setup DKIM (DomainKeys Identified Mail). DKIM is a method of signing emails digitally with public-key cryptography so that the receiver of the email can validate and verify that the email was indeed send and authorised… Read More »

How To Install and Secure Redis 7.0 on Ubuntu 23.04 / Debian – In-memory Caching System

By | October 12, 2023

Redis (Remote Dictionary Server) is an open-source software used to store structured data, which can be used as a database, cache, or message broker. It is known for its speed and versatility. In this article, you will be guided through the process of installing and securing Redis on an Ubuntu machine. Installation 1. Prerequisites There… Read More »

Top “systemctl” command examples in Linux – How to manage system services

By | October 12, 2023

The command-line use systemctl, which stands for “system control,” is essential for managing services on Linux systems using the systemd init system. It is an important tool for monitoring how services, daemons, and other system components behave. To help you learn how to control services on your Linux system, we’ll go into much detail about… Read More »

13 “iostat” Command Examples in Linux – Monitor disk i/o and cpu usage

By | October 12, 2023

The iostat command is a system monitoring tool in Linux that provides comprehensive usage information on input/output (I/O) devices, partitions, and the CPU. This information can be used in analyzing resource allocation and utilization, identifying potential performance issues, and troubleshooting. iostat monitors the active time of I/O devices in relation to their average transfer rates…. Read More »

How to color grade HLG videos with ffmpeg – using LUTs

By | August 30, 2023

HLG (Hybrid Log Gamma) is a gamma curve (scheme) for encoding videos in hdr format developed by BBC and Japan’s NHK for broadcasting. It provides wider dynamic range compared to the standard picture profile in sony camera. Moreover HLG format is backwards compatible with non-hdr display sets that support only sdr. If you have a… Read More »

Journalctl Command examples in Linux – A Comprehensive Guide

By | August 24, 2023

Maintaining a healthy and productive Linux environment requires effective system log management. The journalctl command has evolved into an essential resource for accessing and analyzing system logs with the introduction of systemd, the system and service manager for recent Linux distributions. The journalctl command’s adaptability and utility on Linux-based systems will be examined thoroughly in… Read More »