Question: Problem 2: Write a shell script which: 1. accepts a filename 2. checks if file exists 3. if file exists, copy the file to the

Problem 2: Write a shell script which: 1. accepts a filename

Problem 2: Write a shell script which: 1. accepts a filename 2. checks if file exists 3. if file exists, copy the file to the same name + .bak + the current time

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