There are plenty of features that make Linux special, but one of them that makes it so secure is its permissions system. You can have fine-grain control over all the files in your system and assign permissions to users, groups, and everyone else. The terminal utility “chmod” helps you control all the permissions on your system, so it’s vital to know how chmod works in order to get the most use out of this feature, especially if you’re planning on building your own Linux server.
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