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Managing Serial Networks Using UUCP and PPP in Oracle® Solaris 11.4

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Updated: February 2022

How to Debug Transmissions

Note - UUCP was removed in the Oracle Solaris 11.4 SRU 12 release.

If you cannot contact a particular system, you can check communications to that system with Uutry and uucp.

  1. Become an administrator.

    For more information, see Using Your Assigned Administrative Rights in Securing Users and Processes in Oracle Solaris 11.4.

  2. Try to make contact:
    # /usr/lib/uucp/Uutry -r system

      Replace system with the host name of the system you are unable to contact. This command does the following:

    • Starts the transfer daemon (uucico) with debugging. You can get more debugging information if you are root.

    • Directs the debugging output to /tmp/system.

    • Prints the debugging output to your terminal by issuing the following command:

      # tail -f

      Press Control-C to end output. You can copy the output from /tmp/system if you want to save the output.

  3. If Uutry does not isolate the problem, try to queue a job:
    # uucp -r file system\!/dir/file


    • file – is the name of the file that you want to transfer

    • system – is the name of the system that you want to copy to

    • /dir/file – is the location of the file on the other system

  4. Type the following command:
    # Uutry

    If you still cannot solve the problem, you might need to call your local support representative. Save the debugging output, which can help diagnose the problem.

    Note -  You might also decrease or increase the level of debugging that is provided by Uutry through the –x n option. n indicates the debug level. The default debug level for Uutry is 5.

    Debug level 3 provides basic information about when and how the connection is established, but not much information about the transmission. Debug level 9, however, provides exhaustive information about the transmission process. Be aware that debugging occurs at both ends of the transmission. If you intend to use a level higher than 5 on a moderately large text, contact the other site's administrator and decide when to change the level.