This page explains use cases and examples of SSH tunnels while visually presenting the traffic flows.
(Note that you need to scroll down a little to see the actual SSH command examples).
Source: Visual guide to SSH tunnels
Category: MacOS
OpenSSH Tip: Check Syntax Errors before Restarting SSHD Server
This page explains how to check the OpenSSH sshd server configuration file for syntax errors under Linux/Unix using the command-line option.
Source: OpenSSH Tip: Check Syntax Errors before Restarting SSHD Server – nixCraft
Nmap Commands for Beginners: Simple Scanning Tips
Discover 20 essential Nmap command examples for basic scans, port scans, and more. Perfect for beginners looking to get started with Nmap.
Source: Nmap Commands for Beginners: Simple Scanning Tips – LinuxCapable
Quickly resize and shrink Raspberry Pi SD card image on MacOS
From time to time you may want to quickly copy a raspberry pi image from one system to another….but only have a smaller SD card. Or you started your project as a tryout on a crazy 64GB sd card, and realize later that 8GB would be way enough. So what you want to do, is resize the source image to the smallest size possible, flash it to the new smaller SD card, and expand it again to its new maximum on the new SD card. And so far that process can be very long and painful….but luckily there is a very handy script for that, called PiShrink. I am using the mac version, but there is also a linux version.
Source: Quickly resize and shrink Raspberry Pi SD card image on MacOS – Florian Müller
Similar article that expands on the one linked above: Flash larger SD card image onto smaller card on Mac for your Raspberry Pi – Medium/Practical coding
The Ultimate Guide to Wake on LAN for Windows, MacOS, and Linux
What is Wake on LAN and why is it so hard?
Source: The Ultimate Guide to Wake on LAN for Windows, MacOS, and Linux | Techno Tim Documentation
Sloth – Mac app that shows all open files and sockets
Sloth is a native Mac app that shows all open files and sockets in use by all running processes on your system. This makes it easy to inspect which apps are using which files and sockets.
Source: Sloth – Mac app that shows all open files and sockets | Sveinbjörn Þórðarson
How to use parallel ssh (PSSH) for executing commands in parallel on a number of Linux/Unix/BSD servers
Explains how to install and use parallel ssh (PSSH) tool for executing ssh in parallel on a number of hosts and automate many IT tasks.
ChatGPT Desktop App – Unofficial open source OpenAI ChatGPT desktop app for Mac, Windows, and Linux menubar
Although I have considerable misgivings about trusting AI for anything at this point in time, given its propensity to occasionally just make up answers that are total bulls&!t and invent facts out of thin air, a lot of people are still playing with it, and this software could make it more convenient to do so. Note that I have not personally tested this, so install and use at your own risk.
OpenAI ChatGPT desktop app for Mac, Windows, & Linux menubar using Tauri & Rust (Sonny Lazuardi / GitHub)
How to remap a keyboard in macOS
Use free software to swap keys around, reassign shortcuts, and even control your mouse cursor with your keyboard.
Source: How to remap a keyboard in macOS – The Verge
LuLu – a free alternative to Little Snitch?
If you use MacOS and you would like the functionality of Little Snitch but don’t want to pay for it, this might be an alternative to consider. I haven’t tested it, nor have I done a feature comparison between LuLu and Little Snitch, so this is just to note that it exists and nothing more.
In today’s connected world, it is rare to find an application or piece of malware that doesn’t communicate with a remote server.
LuLu is the free, open-source firewall that aims to block unknown outgoing connections, protecting your privacy and your Mac!
Source: Objective-See: LuLu
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