comm — Select or reject lines common to two files. Both files must be sorted. More information: <https://ww

Produce three tab-separated columns: lines only in first file, lines only in second file, and common lines

comm {{file1}} {{file2}}

Print only lines common to both files

comm -12 {{file1}} {{file2}}

Print only lines common to both files, reading one file from `stdin`

cat {{file1}} | comm -12 - {{file2}}

Get lines only found in first file, saving the result to a third file

comm -23 {{file1}} {{file2}} > {{file1_only}}

Print lines only found in second file, when the files aren't sorted

comm -13 <(sort {{file1}}) <(sort {{file2}})