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dbmmanage(1)                       dbmmanage                      dbmmanage(1)


       dbmmanage - Manage user authentication files in DBM format


       dbmmanage [ encoding ] filename add|adduser|check|delete|update
       username [ encpasswd [ group[,group...] [ comment ] ] ]

       dbmmanage filename view [ username ]

       dbmmanage filename import


       dbmmanage is used to create and update the DBM format files used to
       store usernames and password for basic authentication of HTTP users via
       mod_authn_dbm. Resources available from the Apache HTTP server can be
       restricted to just the users listed in the files created by dbmmanage.
       This program can only be used when the usernames are stored in a DBM
       file. To use a flat-file database see htpasswd.

       Another tool to maintain a DBM password database is htdbm.

       This manual page only lists the command line arguments. For details of
       the directives necessary to configure user authentication in httpd see
       the httpd manual, which is part of the Apache distribution or can be
       found at


              The filename of the DBM format file. Usually without the
              extension .db, .pag, or .dir.

              The user for which the operations are performed. The username
              may not contain a colon (:).

              This is the already hashed password to use for the update and
              add commands. You may use a hyphen (-) if you want to get
              prompted for the password, but fill in the fields afterwards.
              Additionally when using the update command, a period (.) keeps
              the original password untouched.

       group  A group, which the user is member of. A groupname may not
              contain a colon (:). You may use a hyphen (-) if you don't want
              to assign the user to a group, but fill in the comment field.
              Additionally when using the update command, a period (.) keeps
              the original groups untouched.

              This is the place for your opaque comments about the user, like
              realname, mailaddress or such things. The server will ignore
              this field.

       -d     crypt hashing (default, except on Win32, Netware)

       -m     MD5 hashing (default on Win32, Netware)

       -s     SHA1 hashing

       -p     plaintext (not recommended)

       add    Adds an entry for username to filename using the hashed password
              encpasswd. dbmmanage passwords.dat add rbowen foKntnEF3KSXA

              Asks for a password and then adds an entry for username to
              filename. dbmmanage passwords.dat adduser krietz

       check  Asks for a password and then checks if username is in filename
              and if it's password matches the specified one. dbmmanage
              passwords.dat check rbowen

       delete Deletes the username entry from filename. dbmmanage
              passwords.dat delete rbowen

       import Reads username:password entries (one per line) from STDIN and
              adds them to filename. The passwords already have to be crypted.

       update Same as the adduser command, except that it makes sure username
              already exists in filename. dbmmanage passwords.dat update

       view   Just displays the contents of the DBM file. If you specify a
              username, it displays the particular record only. dbmmanage
              passwords.dat view


       One should be aware that there are a number of different DBM file
       formats in existence, and with all likelihood, libraries for more than
       one format may exist on your system. The three primary examples are
       SDBM, NDBM, the GNU project's GDBM, and Berkeley DB 2. Unfortunately,
       all these libraries use different file formats, and you must make sure
       that the file format used by filename is the same format that dbmmanage
       expects to see. dbmmanage currently has no way of determining what type
       of DBM file it is looking at. If used against the wrong format, will
       simply return nothing, or may create a different DBM file with a
       different name, or at worst, it may corrupt the DBM file if you were
       attempting to write to it.

       dbmmanage has a list of DBM format preferences, defined by the
       @AnyDBM::ISA array near the beginning of the program. Since we prefer
       the Berkeley DB 2 file format, the order in which dbmmanage will look
       for system libraries is Berkeley DB 2, then NDBM, then GDBM and then
       SDBM. The first library found will be the library dbmmanage will
       attempt to use for all DBM file transactions. This ordering is slightly
       different than the standard @AnyDBM::ISA ordering in Perl, as well as
       the ordering used by the simple dbmopen() call in Perl, so if you use
       any other utilities to manage your DBM files, they must also follow
       this preference ordering. Similar care must be taken if using programs
       in other languages, like C, to access these files.

       One can usually use the file program supplied with most Unix systems to
       see what format a DBM file is in.

Apache HTTP Server                2018-07-06                      dbmmanage(1)

apache 2.4.59 - Generated Tue Apr 16 13:49:09 CDT 2024
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