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If you’re a programmer, a systems administrator, or really any type of IT worker, you probably have your favorite go-to IP addresses for troubleshooting. And if you’re like me, you’ve probably been using the same ones for years. Such IPs can be used for: Testing ping connectivity Checking DNS resolution using dig or nslookup Updating a system’s permanent… — Become a direct supporter of my content for less than a latte a month ($50/year) and get the Unsupervised Learning podcast and newsletter ev...