HackerNews Summary (2023-04-25 09PM)

Source: Your First LTE

Summary
Learn to build your own LTE network with the help of this lesson, which includes installation, configuration, and best practices. You will need a USRP B200/B210 and a high-end PC, and a GPS antenna is optional. You also need to set up your USRP to connect with your PC, and a programmable SIM card to communicate with the network.

Fact

💻 You will need a high-end PC (at least dual-core i5, better quad-core i7) to attach the USRP B200/B210.

🌍 If you want to use a GPS antenna, you need to set it up near your desk by connecting it to the “GPS ANT” connector of GPS-DO, then connecting the 10MHz output of GPS-DO to the 10MHz input of USRP.

📡 Small antennas should be connected to USRP Rx/Tx ports (RF-A/RF-B), and USRP should be powered via a power supply or over USB 3.0 with port connected to your PC.

💳 You need a programmable SIM card to communicate with the network, which can be connected to your computer by a SIM card reader.

Source: How to use Podman inside of a container

Summary
Running Podman in a container is a frequently asked topic, with people wanting to run it in various combinations (rootful and rootless) of Podman and Docker. Container engines require privileges to run, and examples in this blog will use the quay.io/podman/stable image.

Facts

🐳 Running a container engine like Podman within a container requires a fair amount of privilege.

🔑 Containers require multiple UIDs to work, with some files commonly owned by a different user ID than root.

📁 Container engines use clone to create user namespaces, and mount file systems to run the containers.

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