Microsoft hides file extensions in Windows by default even though it's a security risk that is commonly abused by phishing emails and malware distributors to trick people into opening malicious files.
Mac OS X Server 10.0: How to Set up Multiple IP Addresses on a Single Network Interface TIL article 106418 details the steps needed to set up a single Ethernet interface for multiple IP addresses.
On computers and mobile devices, file extensions are the suffixes that apps append to filenames. When you see an item like "document.docx" for example, the .docx extension tells the computer and the ...
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