sort -u file.txt > no_duplicate.txt
Before:
file.txt
file1.txt
file2.txt
file1.txt
file3.txt
file2.txt
After:
no_duplicate.txt
file1.txt
file2.txt
file3.txt
More than 5 years have passed since last update.
sort -u file.txt > no_duplicate.txt
Before:
file1.txt
file2.txt
file1.txt
file3.txt
file2.txt
After:
file1.txt
file2.txt
file3.txt
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