| Original author(s) | Dennis Ritchie (AT&T Bell Laboratories) |
|---|---|
| Developer(s) | Various open-source and commercial developers |
| Initial release | November 3, 1971 |
| Written in | Plan 9: C |
| Operating system | Unix, Unix-like, Plan 9, Inferno, OS-9, IBM i |
| Type | Command |
| License | coreutils: GPLv3+ Plan 9: MIT License |
In computing, cmp is a command-line utility on Unix and Unix-like operating systems that compares two files of any type and writes the results to the standard output. By default, cmp is silent if the files are the same; if they differ, the byte and line number at which the first difference occurred is reported. The command is also available in the OS-9 shell.[1]