Question: Make a one-line Unix command - using pipe(s) - to display the number of unique zip codes in famous.dat Hint: use -u on sort Attention:
Make a one-line Unix command - using pipe(s) - to display the number of unique zip codes in famous.dat Hint: use -u on sort
Attention: Output from your MUST be the number: 33
Do not use awk in the solution
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