UNIX-to-UNIX copy program (UUCP) is a group of programs, directories, and files that can be used to communicate with any UNIX system that is running a version of the UNIX-to-UNIX copy program (UUCP). A UUCP network traditionally consists of a group of computers joined in a network using serial connections or TCP/IP. The z/OS UNIX implementation of UUCP uses TCP/IP; it does not provide modem support. It is also XPG4-compliant.

The UUCP functions are used to automatically transfer files and requests for command execution from one UUCP system to another, typically in batch mode at scheduled intervals. You can use UUCP for file transfer, remote command execution, and custom applications.

If you use a UUCP utility to transfer a file or execute a remote command, a job request is created and queued. Depending on how UUCP has been configured at your system, the job might be processed immediately or remain queued and only be processed at scheduled times. At some point, either your system will contact the remote system, or be contacted by the remote system at which time the queued jobs will be processed. For security purposes, configuration files on each system control which transfers can take place and which commands can be executed. (See Create or edit UUCP configuration files.)

You must decide if you want to have your system participate in a UUCP network. If you already have made that decision, go to Configuring your local system.

Restriction: UUCP is restricted to an 8-character password. It does not support password phrases.