ntdbbackup - tool for backing up and for validating the integrity of
   samba .ntdb files


   ntdbbackup [-s suffix] [-v] [-h]


   This tool is part of the samba(1) suite.

   ntdbbackup is a tool that may be used to backup samba .ntdb files. This
   tool may also be used to verify the integrity of the .ntdb files prior
   to samba startup or during normal operation. If it finds file damage
   and it finds a prior backup the backup file will be restored.


       Get help information.

   -s suffix
       The -s option allows the administrator to specify a file backup
       extension. This way it is possible to keep a history of ntdb backup
       files by using a new suffix for each backup.

       The -v will check the database for damages (corrupt data) which if
       detected causes the backup to be restored.



   The ntdbbackup utility can safely be run at any time. It was designed
   so that it can be used at any time to validate the integrity of ntdb
   files, even during Samba operation. Typical usage for the command will

   ntdbbackup [-s suffix] *.ntdb

   Before restarting samba the following command may be run to validate
   .ntdb files:

   ntdbbackup -v [-s suffix] *.ntdb

   Note that Samba 4 can use .tdb files instead, so you should use
   tdbbackup on those files.

   Samba .tdb and .ntdb files are stored in various locations, be sure to
   run backup all .(n)tdb files on the system. Important files includes:

   *   secrets.(n)tdb - usual location is in the /usr/local/samba/private
       directory, or on some systems in /etc/samba.

   *   passdb.(n)tdb - usual location is in the /usr/local/samba/private
       directory, or on some systems in /etc/samba.

   *   *.tdb and *.ntdb located in the /usr/local/samba/var directory or
       on some systems in the /var/cache or /var/lib/samba directories.


   This man page is correct for version 4 of the Samba suite.


   tdbbackup(8), ntdbrestore(8)


   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 ntdbbackup man page was written by Rusty Russell, based on the
   tdbbackup man page by John H Terpstra.


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.