Which redirection appends standard error messages to an existing file?

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Multiple Choice

Which redirection appends standard error messages to an existing file?

Explanation:
When you want to send only the error messages to a file and add them to the end of that file, you redirect the standard error stream (file descriptor 2) with an append operator. The correct form is 2>> File, which appends stderr to File without touching stdout. The other forms behave differently: 2> File overwrites the file with just the error output; > File redirects only stdout; &> File redirects both stdout and stderr to the file (not just the error stream).

When you want to send only the error messages to a file and add them to the end of that file, you redirect the standard error stream (file descriptor 2) with an append operator. The correct form is 2>> File, which appends stderr to File without touching stdout.

The other forms behave differently: 2> File overwrites the file with just the error output; > File redirects only stdout; &> File redirects both stdout and stderr to the file (not just the error stream).

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