Apache HTTP Server Version 2.4
dbmmanage is used to create and update the DBM format files
used to store usernames and password for basic authentication of HTTP users
Resources available from the Apache HTTP server can be restricted to just
the users listed in the files created by
program can only be used when the usernames are stored in a DBM file. To
use a flat-file database see
Another tool to maintain a DBM password database is
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 /.
dbmmanage [ encoding ]
[ comment ] ] ]
view [ username ]
dbmmanage filename import
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
command, a period (
.) keeps the original password
:). 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.
dbmmanage passwords.dat add rbowen foKntnEF3KSXA
dbmmanage passwords.dat adduser krietz
dbmmanage passwords.dat check rbowen
dbmmanage passwords.dat delete rbowen
(one per line) from
STDIN and adds them to
filename. The passwords already have to be crypted.
adduser command, except that it makes
sure username already exists in filename.
dbmmanage passwords.dat update rbowen
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
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
@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
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
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.