Use the tr command to translate all uppercase letters in a file, called Grades, to lowercase and store the output in the grades file.
What will be an ideal response?
The tr command reads input from stdin only and sends its output to stdout. The tr command does not work with a file as a command line argument. Thus input redirection is often used with the tr command. The following command performs the given task
tr "[:upper:]" "[:lower:]" < Grades > grades
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