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23 lines
647 B
Markdown
23 lines
647 B
Markdown
# comm
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> Select or reject lines common to two files. Both files must be sorted.
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- Produce three tab-separated columns: lines only in first file, lines only in second file and common lines:
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`comm {{file1}} {{file2}}`
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- Print only lines common to both files:
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`comm -12 {{file1}} {{file2}}`
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- Print only lines common to both files, reading one file from stdin:
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`cat {{file1}} | comm -12 - {{file2}}`
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- Get lines only found in first file, saving the result to a third file:
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`comm -23 {{file1}} {{file2}} > file1-only.txt`
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- Print lines only found in second file, when the files aren't sorted:
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`comm -13 <(sort {{file1}}) <(sort {{file2}})`
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