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1. Create a script file: make_copy.sh:-

cat > make_copy.sh
file_name="/home/field1"
cp ${file_name} ${file_name}.bak

2. Run the script file: make_copy.sh:-

chmod +x make_copy.sh...

You're right. I'm not doing well today... Once more:

Try running that code on a bit modified input:Mark Jacobs 01
Mark Davis 03
Kerry Wild 05
Parker Jacobs 08
Adam Jacobs 08Notice where "Adam" is placed.

I must be missing something very basic here. Assuming that the first field in your input file is the first name and the second field in your input file is the last name, why isn't:
sort -k2...

To pipe the output to another file: awk '{print $2}' filename | sort | uniq | while read last_name; do awk -vn=$last_name '$2==n' filename | sort -k1; done > first_last

I think it can't be achieved with single sort run. This works, but I don't know if it is not too complicated for your course. Anyway here it is: awk '{print $2}' filename | sort | uniq | while read...