ldapsearch is located in the openldap-clients package.
ldapsearch -xh ldap.example.com uid=usr1234
ldapsearch -xh ldap.example.com uid=usr1234 uniqueIdentifier
ldapsearch -xh ldap.example.com uniqueIdentifier=042282876 uid uidNumber gidNumber homedirectory gsaRegistrar
ldapsearch -xh ldap.example.com -b 'ou=bluepages, o=example.com' email=user@example.com
ldapsearch -xh ldap.example.com -b 'ou=bluepages, o=example.com' email=user@example.com dept
ldapsearch -xh ldap.example.com -b 'ou=bluepages, o=example.com' serialnumber=042282876
ldapsearch -xh ldap.example.com -b 'ou=bluepages, o=example.com' serialnumber=042282876 dept
ldapsearch -xh ldap.example.com uniqueIdentifier=042282876 uid uidNumber gidNumber homedirectory gsaRegistrar loginshell
ldapsearch -h ldap.example.com m -bou=ldap,dc=example,dc=com fullserialnumber=042282876
ldapsearch -h ldap.example.com -bou=ldap,dc=example,dc=com uidNumber=103 uid