Merge records based on matching first fields.
Section: join and comm
Join two files on a common field
bash
bash
join users.txt departments.txtExplanation
Both input files should usually be sorted on the join field first.
Learn the surrounding workflow
Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.
Related commands
Same sheet · prioritizing join and comm
Show common lines between sorted files
Print only lines present in both files.
Show lines only in the first file
List lines unique to the first sorted file.
Show lines only in the second file
List lines unique to the second sorted file.
Extract comma-delimited fields
Print the first and third fields from a CSV-like file.