To run it:
ldapsearch -h ldap.example.com <query>
more useful options:
-x no SASL (e.g. if you get an error about "No credentials cache file found")
complete examples:
ldapsearch -H ldap://ldap.example.com -x -b 'ou=people,dc=example,dc=com'
ldapsearch -H ldap://ldap.example.com -x -b 'ou=people,dc=example,dc=com' '(uid=jungwirthp)'
# binding as the user:
ldapsearch -H ldap://ldap.example.com -x -D 'cn=jungwirthp,ou=People,dc=example,dc=org' -w CENSORED -b 'ou=people,dc=example,dc=org' '(uid=jungwirthp)'