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How to grep standard error stream (stderr)?

ls FileNotExist |& grep -v acc ls FileNotExist 2<&1 | grep -v acc In this example, command1 is executed, and both its output and any error messages are piped directly into command2. This ...
RaZieRSarE's user avatar
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FFmpeg: The option 'to' works differently depending on where we put it. Why is it so?

man ffmpeg: As a general rule, options are applied to the next specified file. Therefore, order is important, and you can have the same option on the command line multiple times. Each occurrence is ...
Marcus Müller's user avatar

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