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man pages section 8: System Administration Commands

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Updated: Wednesday, July 27, 2022

samba_downgrade_db (8)


samba_downgrade_db - Samba tool for downgrading AD databases


samba_downgrade_db [-H] [-s]


SAMBA_DOWNGRADE_DB(8)            User Commands           SAMBA_DOWNGRADE_DB(8)

       samba_downgrade_db - Samba tool for downgrading AD databases

       samba_downgrade_db [-H] [-s]

       This tool is part of the samba(8) suite.

       The format of the Samba Active Directory (AD) database changed in
       version 4.8 and 4.11. When downgrading a Samba AD Domain Controller
       (DC) to a release that is older than either of these versions (e.g.
       4.11 to 4.10), the AD database must be manually downgraded before the
       Samba packages can be safely downgraded.

       This tool downgrades a Samba sam.ldb database from the format used in
       version 4.13.17 to that of version 4.7. The v4.7 database format can
       safely be read by any version of Samba. If necessary, later versions of
       Samba will repack and reconfigure a v4.7-format database when the samba
       executable is first started.

       Note that all Samba services must be stopped on the DC before running
       this tool. Once the tool has run, do not restart samba or modify the
       database before the Samba software package has been downgraded.

       -H [sam.ldb file]
           Link directly to a sam.ldb file instead of using path in system

       -s [smb.conf file]
           Link directly to smb.conf file instead of system default (usually
           in /usr/local/samba/etc/smb.conf)

       This man page is complete for version 4.13.17 of the Samba suite.

       The original Samba software and related utilities were created by
       Andrew Tridgell. Samba is now developed by the Samba Team as an Open
       Source project similar to the way the Linux kernel is developed.

       The samba_downgrade_db tool was developed by the Samba team at Catalyst
       IT Ltd.

       See attributes(7) for descriptions of the following attributes:

       |Availability   | service/network/samba |
       |Stability      | Volatile              |

       Source code for open source software components in Oracle Solaris can
       be found at https://www.oracle.com/downloads/opensource/solaris-source-

       This software was built from source available at
       https://github.com/oracle/solaris-userland.  The original community
       source was downloaded from

       Further information about this software can be found on the open source
       community website at http://www.samba.org/.

Samba 4.13.17                     06/28/2022             SAMBA_DOWNGRADE_DB(8)