syslog-ng-debun - syslog-ng DEBUg buNdle generator

       This manual page was written by the Balabit Documentation Team <documentation@balabit.com>.

-d
           Start in debug mode, using the -Fedv--enable-core options.

           Warning! Using this option under high message load may increase disk I/O during the debug, and the
           resulting debug bundle can be huge. To exit debug mode, press Enter.

       -D<options>
           Start in debug mode, using the specified command-line options. To exit debug mode, press Enter. For
           details on the available options, see ???.

       -t<seconds>
           Run in noninteractive debug mode for <seconds>, and automatically exit debug mode after the specified
           number of seconds.

       -w<seconds>
           Wait <seconds> seconds before starting debug mode.

       NOTE: The syslog-ng-debun application is distributed with the system logging application, and is usually
       part of the package. The latest version of the application is available at .

       This manual page is only an abstract, for the complete documentation of syslog-ng, see Thesyslog-ngAdministratorGuide[1].

       The syslog-ng-debun tool collects and saves information about your installation, making troubleshooting
       easier, especially if you ask help about your related problem.

           syslog-ng-debun -r

       Create a simple debug bundle, collecting information about your environment, for example, list packages
       containing the word: syslog, ldd of your syslog-binary, and so on.

           syslog-ng-debun -r -l

       Similar to syslog-ng-debun-r, but without privacy-sensitive information. For example, the following is
       NOT collected: fstab, df output, mount info, ip / network interface configuration, DNS resolv info, and
       process tree.

           syslog-ng-debun -r -d

       Similar to syslog-ng-debun-r, but it also stops syslog-ng, then restarts it in debug mode (-Fedv--enable-core). To stop debug mode, press Enter. The output of the debug mode collected into a separate
       file, and also added to the debug bundle.

           syslog-ng-debun -r -s

       Trace the system calls (using strace or truss) of an already running process.

           syslog-ng-debun -r -d -s

       Restart in debug mode, and also trace the system calls (using strace or truss) of the process.

           syslog-ng-debun -r -p

       Run packet capture (pcap) with the filter: port514orport601orport53 Also waits for pressing Enter,
       like debug mode.

           syslog-ng-debun -r -p -t 10

       Noninteractive debug mode: Similar to syslog-ng-debun-r-p, but automatically exit after 10 seconds.

           syslog-ng-debun -r -P "host 1.2.3.4"  -D "-Fev --enable-core"

       Change the packet-capturing filter from the default to host1.2.3.4. Also change debugging parameters
       from the default to -Fev--enable-core. Since a timeout (-t) is not given, waits for pressing Enter.

           syslog-ng-debun -r -p -d -w 5 -t 10

       Collect pcap and debug mode output following this scenario:

       •   Start packet capture with default parameters (-p)

       •   Wait 5 seconds (-w5)

       •   Stop syslog-ng

       •   Start syslog-ng in debug mode with default parameters (-d)

       •   Wait 10 seconds (-t10)

       •   Stop syslog-ng debugging

       •   Start syslog-ng

       •   Stop packet capturing

       /usr/bin/loggen

-r
           Run syslog-ng-debun. Using this option is required to actually execute the data collection with
           syslog-ng-debun. It is needed to prevent accidentally running syslog-ng-debun.

       -h
           Display the help page.

       -l
           Do not collect privacy-sensitive data, for example, process tree, fstab, and so on. If you use with
           -d, then the following parameters will be used for debug mode:-Fev-R<directory>
           The directory where is installed instead of /opt/syslog-ng.

       -W<directory>
           Set the working directory, where the debug bundle will be saved. Default value: /tmp. The name of the
           created file is syslog.debun.${host}.${date}.${3-random-characters-or-pid}.tgz

       syslog-ng-debun - syslog-ng DEBUg buNdle generator

        1. The syslog-ng Administrator Guide
           https://www.balabit.com/support/documentation/

        2. The4.8AdministratorGuide
           https://www.balabit.com/documents/syslog-ng-ose-latest-guides/en/syslog-ng-ose-guide-admin/html/index.html

        3. syslog-ngmailinglist
           https://lists.balabit.hu/mailman/listinfo/syslog-ng

        4. syslog-ngblogs
           https://syslog-ng.org/blogs/

4.8                                                03/16/2025                                 SYSLOG-NG-DEBUN(1)

       Capturing packets requires a packet capture tool on the host. The syslog-ng-debun tool attempts to use
       tcpdump on most platforms, except for Solaris, where it uses snoop.

       -i<interface>
           Capture packets only on the specified interface, for example, eth0.

       -p
           Capture incoming packets using the following filter: port514orport601orport53-P<options>
           Capture incoming packets using the specified filter.

       -t<seconds>
           Run in noninteractive debug mode for <seconds>, and automatically exit debug mode after the specified
           number of seconds.

syslog-ng.conf(5)

           Note

           For the detailed documentation of see The4.8AdministratorGuide[2]

           If you experience any problems or need help with syslog-ng, visit the syslog-ngmailinglist[3].

           For news and notifications about of syslog-ng, visit the syslog-ngblogs[4].

syslog-ng-debun [options]

-s
           Enable syscall tracing (strace-f or truss-f). Note that using -s itself does not enable debug mode,
           only traces the system calls of an already running process. To trace system calls in debug mode, use
           both the -s and -d options.