Question: Using Linux bash 1. I want to read all input to the command from file1 direct all output to file2 and error to file 3,

Using Linux bash

1. I want to read all input to the command from file1 direct all output to file2 and error to file 3, how can I achieve this?

2. How to list files where third letter is a or b ?

3. How to remove array element with id 4 ?

4. Write a shell script that adds an extension .Newto all the files in a director

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