You can easily monitor and manage multiple Linux computers with Cockpit, a browser-based administration and dashboard tool. It’s self-contained, simple to set up, and easy to use. We’ll show you how to get started. Managing Multiple Linux Servers If you have multiple Linux computers or servers to monitor, you have a challenge. This is especially true if some of them are running as headless systems with no monitor attached. For example, you might have rack-mounted or remote servers located in different buildings or a collection of Raspberry Pi’s scattered around your home. How can you monitor the health and performance of all of these? If you use Secure Shell (SSH) to connect to them, you can run top or another terminal-based monitoring tool. You’ll get some useful information, but each tool has its own specific area of interest. It’s awkward to have to move from tool to tool to view the different metrics of your remote Linux computer. Unfortunately, there’s no … [Read more...] about How to Manage Linux Servers with the Cockpit Web Interface
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While you’re still waiting on your refrigerator or your microwave to be as smart as your phone, the car in your garage is already ahead of the curve. If you own a vehicle made after 1996, you can connect to it with a simple device called an OBD-II adapter and find out your fuel efficiency, diagnose check engine lights, and gather a ton of other useful data. Most cars manufactured since the 80s have an on-board diagnostics (or OBD) computer inside. These computers allow mechanics and regulators to troubleshoot any computer-controlled parts of the car. From January 1st, 1996 onward, all cars sold within the US were required to have an OBD-II compatible port. This allows anyone with an adapter to read information from the car. You may have seen this when a technician checks your emissions. For the most part, OBD-II tools were only used by professionals to do things like figure out why you check engine light is on, or to make sure your car is meeting emission standards. However, … [Read more...] about How to Make Your Car Smarter with an OBD-II Adapter
Signal secures all your conversations with end-to-end encryption, offering more privacy and security than your average chat app. But Signal offers some other useful security options. Here’s how to take advantage of them. Enable Registration Lock to Protect Your Signal Account Your Signal account is tied to your phone number, with no need for a password at all. When you first register for Signal (or re-register a device at a later stage), Signal will verify who you are by sending a code to your number. Enter the code to prove you are who you say you are and you’re good to go. But what happens if someone gets access to your phone number? While this might seem like an unlikely eventuality, it’s within the realm of possibility. Someone could steal your smartphone’s SIM card or fool your phone service provider into transferring your number to a new SIM using social engineering techniques . With access to your phone number, someone could gain access to your entire Signal … [Read more...] about How to Make Your Signal Chats as Secure as Possible
Websites you access can determine your physical geographical location in a few ways. Your IP address reveals your general area—unless you use a VPN. Websites can also ask for a more precise location. What Your IP Address Tells Websites Your internet service provider gives you a public IP address . All the devices on your home network share that IP address, and your address is unique on the internet. When you connect to a website, that website then sees your IP address. Your computer connects to the website’s IP address, and the website sends data back to your IP address. Packets are transmitted through network routers, and the IP address on those packets tells the routers where they need to go. However, websites can’t trace that unique IP address to your physical home or business address. Instead, websites can tie your IP address to your internet service provider, city, region, and even possibly your ZIP code. This is why you see ads for local businesses in your area … [Read more...] about Can Websites See Your Physical Location?
Your smartphone — and other devices that use Wi-Fi — broadcast a unique number when they search for nearby Wi-Fi networks. A device’s unique MAC address is sent along with “probe requests” that search for nearby Wi-Fi networks. This tracking problem isn’t just theoretical. Advertisers in London used Wi-Fi-enabled garbage cans to track people’s movements around the city . The Wi-Fi specification wasn’t designed for a world where people carried Wi-Fi-scanning devices in their pockets all day long. Why Your Devices Have Unique MAC Addresses RELATED: How (and Why) to Change Your MAC Address on Windows, Linux, and Mac Each physical network interface — whether it’s a wired Ethernet card in a desktop PC or a Wi-Fi chipset in a smartphone — ships with a unique MAC address. This number is designed to be unique to the hardware. This lets networks you connect to identify the device. For example, at home, you could adjust your home router’s settings to assign static IP … [Read more...] about Your Devices Broadcast Unique Numbers, and They’re Being Used to Track You
Buying a TV is more complex than ever. There are new technologies, formats, and buzzwords you have to keep up with. Plus, pricing is also all over the place as more affordable companies try to unseat brands like LG and Samsung. And if you’re looking for a TV specifically for gaming , different features are more important. We’re breaking down everything you need to know to make the wisest purchase! Choosing a Display: OLED, QLED, and More Currently, there are two dominant display technologies on the market: LED-LCD (including QLED) and OLED. Understanding the differences will help you make the right decision. A simple rule of thumb is to match the display type to your viewing habits. Most TVs on the market are LCD panels lit with an LED backlight. These include the cheapest new TVs, from brands like TCL and Hisense, all the way to LG’s NanoCell lineup and Samsung’s top-tier QLED sets. Not all LED-lit panels are equal, however. Panels advertised as QLED use a Quantum … [Read more...] about How to Buy a TV: What You Need to Know