Editing Join (Unix) (section)

{{Short description|Command in Unix-like operating systems}}
{{lowercase}}
{{Infobox software
| name                   = join
| logo                   = 
| screenshot             = 
| screenshot size        = 
| caption                = 
| author                 = [[Douglas McIlroy]]
| developer              = [[AT&T Bell Laboratories]]
| released               = {{Start date and age|1979|1}}
| latest release version = 
| latest release date    = 
| programming language   = [[C (programming language)|C]]
| operating system       = [[Unix]], [[Unix-like]], [[Plan 9 from Bell Labs|Plan 9]]
| platform               = [[Cross-platform]]
| genre                  = [[Command (computing)|Command]]
| license                = [[coreutils]]: [[GPLv3+]]<br />Plan 9: [[MIT License]]
| website                = 
}}
'''<code>join</code>''' is a command in [[Unix]] and [[Unix-like]] [[operating system]]s that merges the lines of two sorted [[text file]]s based on the presence of a common [[Field (computer science)|field]]. It is similar to the join operator used in [[relational database]]s but operating on text files.