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Waveshare sells a surprising number of boards built around Espressif's ESP32-S3. That sounds useful until you open the catalogue and meet a wall of names such as ESP32-S3-LCD-2.8, ESP32-S3-LCD-2.8B, E
Most AI agents that support scheduled tasks have two sources of instruction when a cron job fires: The cron prompt — the task-specific instructions you wrote when scheduling the job The skill — a re
TL;DR Scarp draw result, host on GitHub, retrieve it like API at damacai.hongineer.com. Data Scraping I have previously shared a technique for scraping Da Ma Cai draw result. Now I finally have time t
This is a Bash script that check if the replica (slave) health status. If there is an issue, it will exist with non-zero status. This is useful when used with monitoring tools like [Monit](https://mmo
chmod is a command-line utility used to change the access permissions of file system objects such as files and directories. It allows you to control who can read, write, and execute those objects. Changing Permissions Using Octal Notation Example Usa...
chown changes the ownership of files and directories. This involves modifying the user and/or group associated with a file, determining who has access and permissions. Changing File Ownership to a Specific User Example Usage: chown user file.txt What...
The usermod command modifies a user account's properties on a Linux system. It allows administrators to change various attributes associated with a user, such as the user's login name, home directory, shell, groups, and password expiry information. C...
tcpdump is a powerful command-line packet analyzer used to capture network traffic passing through a network interface. It allows you to monitor and diagnose network issues by displaying the contents of network packets. Capturing all traffic on an in...
nmap is a powerful network scanning tool used to discover hosts and services on a computer network by sending packets and analyzing the responses. It's widely used for network inventory, managing service upgrade schedules, and monitoring host or serv...