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PERFECT!! Thanks so much!!

I'm using the sed command to pull a line from a file and place it into another file:

sed -n '1p' students >tmp

this pulls the first line, I want to change the 1 to a variable which will be a...

I need to add an average field to a file. I can create it in an on-screen report and it does what I need using the awk command but I can't get it to create a new file with the additional field. ...