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Using shell, how to find the difference between two files?

General/Othereasy0.3 min readPremium
Frequency
Low
Asked at 1 company
Category
243
questions in General/Other
Difficulty Split
151E|43M|49H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Citi
Expert AnswerPremium
56 wordsInterview-ready
diff file1 file2 (line-by-line). diff -u (unified). diff -r dir1 dir2 (recursive). cmp (byte-by-byte; exit 0 if identical). comm -3 <(sort f1) <(sort f2) for sorted common lines. Large files: md5sum/sha256sum first to skip diff if identical. WHY: diff for review; checksums for binary or quick equality....
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