DBMMANAGE(1) dbmmanage DBMMANAGE(1)
dbmmanage - Manage user authentication files in DBM format
dbmmanage [ encoding ] filename add|adduser|check|delete|update user-
name [ 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.
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 http://httpd.apache.org/.
The filename of the DBM format file. Usually without the exten-
sion .db, .pag, or .dir.
The user for which the operations are performed. The username
may not contain a colon (:).
This is the already encrypted 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 con-
tain 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. Addi-
tionally 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
-d crypt encryption (default, except on Win32, Netware)
-m MD5 encryption (default on Win32, Netware)
-s SHA1 encryption
-p plaintext (not recommended)
add Adds an entry for username to filename using the encrypted pass-
word encpasswd. dbmmanage passwords.dat add rbowen foKntnEF3KSXA
Asks for a password and then adds an entry for username to file-
name. 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 pass-
words.dat check rbowen
delete Deletes the username entry from filename. dbmmanage pass-
words.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
One should be aware that there are a number of different DBM file for-
mats 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 dif-
ferent 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 @Any-
DBM::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 order-
ing 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 prefer-
ence 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 2004-12-10 DBMMANAGE(1)