System & Network Admin

Last time, I gave a whirlwind introduction to a very small slice of systemd. If you aren’t comfortable with systemd services, timers, and mounts, you might want to read that now. Otherwise, p…

By facilitating the automation and orchestration of infrastructure components, IaC is central to the success of generative AI.

Last time, we looked into using a logic analyzer to decode SPI signals of LCD displays, which can help us reuse LCD screens from proprietary systems, or port LCD driver code from one platform to an…

It’s not difficult to export your notes and notebooks out of Evernote.

Butterchurn Visualizer is a WebGL implementation of the Milkdrop Visualizer, bringing the best music visualizations to the web

Get back 1 hour per day with these tips and tricks

Setting up PostgreSQL for tests is crucial for achieving performance and reliability. In this article, I'll explain how to set up PostgreSQL for tests and discuss some common pitfalls to avoid.

I am new at scripting ... I can do very basic stuff, but now I need a hand. I have a local filesystem that only will be mounted when I need to do a backup. I'm starting with this. #!/bin/bash ex...

A quick and practical Bash guide to checking if a directory is mounted.

If you need to get rid of a Mac or external drive, how do you ensure that no one can access the data on it? Adam Engst runs through the various methods you can employ, one or more of which should address your situation.

Learn how to securely erase a Solid State Drive (SSD) on a Mac for enhanced data privacy and protection. Step-by-step guide for safe and efficient SSD data wiping.

We will show you how to securely delete files on different Mac versions in this post. Check it now to protect your data with a layer of security.

What does securely erase files mean and how do I securely erase files? Learn how to permanently delete the files in this article.

Are you worried about deleting sensitive files on an older Mac? If your Mac has a regular HDD, learn how to securely erase files so they're unrecoverable.

If you're selling your PC or storage drive, you need to wipe it.

When a file is deleted, its contents may still be left in the filesystem, unless explicitly overwritten with something else. The wipe command can securely erase files, but does not seem to allow er...

Lots of different programs, such as Darik's Boot and Nuke, let you write over a hard drive multiple times under the guise of it being more secure than just doing it once. Why?

DDI Guru provides DNS, DHCP and IPAM consulting, engineering and development professional services

DNS has a number of mechanisms for redundancy and high availability. More often than not, clients will have a primary and secondary nameserver to talk to. However, if the primary nameserver fails for whatever reason, then the queries to the primary usually need to timeout before attempting queries to the secondary. Also the speed of general web browsing can often be dictated by how long it takes to receive a valid DNS response to the query.

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