The copied file is just a backup, which is good practice when editing configuration files in Linux (and any other system).
There are numerous naming conventions when backing up files. I usually use the suffix .bak, like this: "sudo cp myfile.txt myfile.txt.bak"
And regarding your frustrations with the Linux world, I'll probably speak for everyone when I say: we've all been there! If I were you, I would uninstall windows completely and force yourself into Linux - suddenly you will find that the learning curve flattens out, and will feel relieved to have gotten rid of Windows' tick box nightmare :)
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The copied file is just a backup, which is good practice when editing configuration files in Linux (and any other system).
There are numerous naming conventions when backing up files. I usually use the suffix .bak, like this: "sudo cp myfile.txt myfile.txt.bak"
And regarding your frustrations with the Linux world, I'll probably speak for everyone when I say: we've all been there! If I were you, I would uninstall windows completely and force yourself into Linux - suddenly you will find that the learning curve flattens out, and will feel relieved to have gotten rid of Windows' tick box nightmare :)