Unix Commands removing duplicate names

Question

Suppose that file1, file2, file3, file4, and file5x each contain a list of new usernames to be added to the system, but you only have time to add the first 50 users and you need to remove duplicate usernames and save the results to a file named usernames. What would be the UNIX command to do this?

cat f1 <(echo) f2 <(echo) f3 <(echo) | sort | uniq > usernames the sort is necessary as uniq only filters out adjacent duplicates. — Nils Werner
– Nils Werner, Commented Oct 8, 2013 at 13:41

Alexander L. Belikoff · Accepted Answer · 2013-10-08 13:42:55Z

3

Use:

cat file1 file2 .... fileNN | sort -u

answered Oct 8, 2013 at 13:42

Alexander L. Belikoff

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1 Comment

fedorqui Over a year ago

Or cat file[1-5] for this case.

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