dbmmanage - Manage user authentication files in DBM format
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
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/.
dbmmanage [ encoding ]
[ comment ] ] ]
view [ username ]
dbmmanage filename import
- The filename of the DBM format file. Usually without the extension
- 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
addcommands. You may use a hyphen (
-) if you want to get prompted for the password, but fill in the fields afterwards. Additionally when using the
updatecommand, a period (
.) keeps the original password untouched.
- A group, which the user is member of. A groupname may not contain a
:). 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
updatecommand, 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.
- crypt encryption (default, except on Win32, Netware)
- MD5 encryption (default on Win32, Netware)
- SHA1 encryption
- plaintext (not recommended)
- Adds an entry for username to filename using the
encrypted password encpasswd.
dbmmanage passwords.dat add rbowen foKntnEF3KSXA
- Asks for a password and then adds an entry for username to
dbmmanage passwords.dat adduser krietz
- 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
- Deletes the username entry from filename.
dbmmanage passwords.dat delete rbowen
username:passwordentries (one per line) from
STDINand adds them to filename. The passwords already have to be crypted.
- Same as the
addusercommand, except that it makes sure username already exists in filename.
dbmmanage passwords.dat update rbowen
- 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
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.