4Aug/100
Tip of the day: How to remove duplicate entries in a file without sorting
GNU awk is a programming language that is designed for processing text-based data, either in files or data streams, and was created in the 1970s at Bell Labs.
To remove duplicate entries without sorting them, enter:
gawk '!x[$0]++' filename
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A strict observance of the written laws is doubtless one of the high virtues of a good citizen, but it is not the highest. The laws of necessity, of self-preservation, of saving our country when in danger, are of higher obligation.
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