Set operations (GNU Coreutils 9.0)
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Coreutils/docs/latest/Set-operations
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8.3.6 Union, Intersection and Difference of files
Combine sort, uniq and join to perform the equivalent of set operations on files:
| Command | outcome |
|---|---|
sort -u file1 file2
|
Union of unsorted files |
| uniq -d | Intersection of unsorted files |
| uniq -u | Difference of unsorted files |
| uniq -u | Symmetric Difference of unsorted files |
join -t -a1 -a2 file1 file2
|
Union of sorted files |
join -t file1 file2
|
Intersection of sorted files |
join -t -v2 file1 file2
|
Difference of sorted files |
join -t -v1 -v2 file1 file2
|
Symmetric Difference of sorted files |
All examples above operate on entire lines and not on specific fields: sort without -k and join -t both consider entire lines as the key.
