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ISBN : 978-2-7460-9712-4
EAN : 9782746097124
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CentOS 2.1AS







ldapsearch − LDAP search tool


ldapsearch [−n] [−u] [−v] [−k] [−K] [−t] [−A] [−C] [−L[L[L]]] [−M[M]] [−d debuglevel] [−f file] [−D binddn] [−W] [−w bindpasswd] [−H ldapuri] [−h ldaphost] [−p ldapport] [−P 2|3] [−b searchbase] [−s base|one|sub] [−a never|always|search|find] [−l timelimit] [−z sizelimit] [−O security-properties] [−I] [−Q] [−U authcid] [−x] [−X authzid] [−Y mech] [−Z[Z]] filter [attrs...]


ldapsearch is a shell-accessible interface to the ldap_search(3) library call.

ldapsearch opens a connection to an LDAP server, binds, and performs a search using specified parameters. The filter should conform to the string representation for search filters as defined in RFC 2254. If not provided, the default filter, (objectClass=*), is used.

If ldapsearch finds one or more entries, the attributes specified by attrs are returned. If * is listed, all user attributes are returned. If + is listed, all operational attributes are returned. If no attrs are listed, all attributes are returned. If only 1.1 is listed, no attributes will be returned.



Show what would be done, but don’t actually perform the search. Useful for debugging in conjunction with -v.


Include the User Friendly Name form of the Distinguished Name (DN) in the output.


Run in verbose mode, with many diagnostics written to standard output.


Use Kerberos IV authentication instead of simple authentication. It is assumed that you already have a valid ticket granting ticket. ldapsearch must be compiled with Kerberos support for this option to have any effect.


Same as −k, but only does step 1 of the Kerberos IV bind. This is useful when connecting to a slapd and there is no x500dsa.hostname principal registered with your Kerberos Domain Controller(s).


Write retrieved values to a set of temporary files. This is useful for dealing with non-ASCII values such as jpegPhoto or audio.


Retrieve attributes only (no values). This is useful when you just want to see if an attribute is present in an entry and are not interested in the specific values.


Search results are display in LDAP Data Interchange Format detailed in ldif(5). A single -L restricts the output to LDIFv1. A second -L disables comments. A third -L disables printing of the LDIF version. The default is to use an extended version of LDIF.


Enable manage DSA IT control. −MM makes control critical.


Automatically chase referrals.

−S attribute

Sort the entries returned based on attribute. The default is not to sort entries returned. If attribute is a zero-length string (""), the entries are sorted by the components of their Distingished Name. See ldap_sort(3) for more details. Note that ldapsearch normally prints out entries as it receives them. The use of the −S option defeats this behavior, causing all entries to be retrieved, then sorted, then printed.

−d debuglevel

Set the LDAP debugging level to debuglevel. ldapsearch must be compiled with LDAP_DEBUG defined for this option to have any effect.

−f file

Read a series of lines from file, performing one LDAP search for each line. In this case, the filter given on the command line is treated as a pattern where the first occurrence of %s is replaced with a line from file. If file is a single - character, then the lines are read from standard input.


Use simple authentication instead of SASL.

−D binddn

Use the Distinguished Name binddn to bind to the LDAP directory.


Prompt for simple authentication. This is used instead of specifying the password on the command line.

−w bindpasswd

Use bindpasswd as the password for simple authentication.

−H ldapuri

Specify URI(s) referring to the ldap server(s).

−h ldaphost

Specify an alternate host on which the ldap server is running. Deprecated in favor of -H.

−p ldapport

Specify an alternate TCP port where the ldap server is listening. Deprecated in favor of -H.

−b searchbase

Use searchbase as the starting point for the search instead of the default.

−s base|one|sub

Specify the scope of the search to be one of base, one, or sub to specify a base object, one-level, or subtree search. The default is sub.

−a never|always|search|find

Specify how aliases dereferencing is done. Should be one of never, always, search, or find to specify that aliases are never dereferenced, always dereferenced, dereferenced when searching, or dereferenced only when locating the base object for the search. The default is to never dereference aliases.

−P 2|3

Specify the LDAP protocol version to use.

−l timelimit

wait at most timelimit seconds for a search to complete. A timelimit of 0 (zero) removes the ldap.conf limit. A server may impose a maximal timelimit which only the root user may override.

−z sizelimit

retrieve at most sizelimit entries for a search. A sizelimit of 0 (zero) removes the ldap.conf limit. A server may impose a maximal sizelimit which only the root user may override.

−O security-properties

Specify SASL security properties.


Enable SASL Interactive mode. Always prompt. Default is to prompt only as needed.


Enable SASL Quiet mode. Never prompt.

−U authcid

Specify the authentication ID for SASL bind. The form of the ID depends on the actual SASL mechanism used.

−X authzid

Specify the requested authorization ID for SASL bind. authzid must be one of the following formats: dn:<distinguished name> or u:<username>

−Y mech

Specify the SASL mechanism to be used for authentication. If it’s not specified, the program will choose the best mechanism the server knows.


Issue StartTLS (Transport Layer Security) extended operation. If you use −ZZ, the command will require the operation to be successful.


If one or more entries are found, each entry is written to standard output in LDAP Data Interchange Format or ldif(5):

version: 1

# bjensen, example, net

dn: uid=bjensen, dc=example, dc=net

objectClass: person

objectClass: dcObject

uid: bjensen

cn: Barbara Jensen

sn: Jensen


If the -t option is used, the URI of a temporary file is used in place of the actual value. If the -A option is given, only the "attributename" part is written.


The following command:

ldapsearch -LLL "(sn=smith)" cn sn telephoneNumber

will perform a subtree search (using the default search base defined in ldap.conf(5)) for entries with a surname (sn) of smith. The common name (cn), surname (sn) and telephoneNumber values will be retrieved and printed to standard output. The output might look something like this if two entries are found:

dn: uid=jts, dc=example, dc=com

cn: John Smith

cn: John T. Smith

sn: Smith

sn;lang-en: Smith

sn;lang-de: Schmidt

telephoneNumber: 1 555 123-4567

dn: uid=sss, dc=example, dc=com

cn: Steve Smith

cn: Steve S. Smith

sn: Smith

sn;lang-en: Smith

sn;lang-de: Schmidt

telephoneNumber: 1 555 765-4321

The command:

ldapsearch -LLL -u -t "(uid=xyz)" jpegPhoto audio

will perform a subtree search using the default search base for entries with user id of "xyz". The user friendly form of the entry’s DN will be output after the line that contains the DN itself, and the jpegPhoto and audio values will be retrieved and written to temporary files. The output might look like this if one entry with one value for each of the requested attributes is found:

dn: uid=xyz, dc=example, dc=com
ufn: xyz, example, com
audio:< file::/tmp/ldapsearch-audio-a19924
jpegPhoto:< file::=/tmp/ldapsearch-jpegPhoto-a19924

This command:

ldapsearch -LLL -s one -b "c=US" "(o=University*)" o description

will perform a one-level search at the c=US level for all entries whose organization name (o) begins begins with University. The organization name and description attribute values will be retrieved and printed to standard output, resulting in output similar to this:

dn: o=University of Alaska Fairbanks, c=US
o: University of Alaska Fairbanks
description: Preparing Alaska for a brave new yesterday
description: leaf node only

dn: o=University of Colorado at Boulder, c=US
o: University of Colorado at Boulder
description: No personnel information
description: Institution of education and research

dn: o=University of Colorado at Denver, c=US
o: University of Colorado at Denver
o: UCD
o: CU/Denver
o: CU-Denver
description: Institute for Higher Learning and Research

dn: o=University of Florida, c=US
o: University of Florida
o: UFl
description: Warper of young minds



Exit status is zero if no errors occur. Errors result in a non-zero exit status and a diagnostic message being written to standard error.


ldapadd(1), ldapdelete(1), ldapmodify(1), ldapmodrdn(1), ldap.conf(5), ldif(5), ldap(3), ldap_search(3)


The OpenLDAP Project <http://www.openldap.org/>


OpenLDAP is developed and maintained by The OpenLDAP Project (http://www.openldap.org/). OpenLDAP is derived from University of Michigan LDAP 3.3 Release.