我正在尝试在 ubuntu 16.04 上设置 ldap 服务器。在安装 ldap-utils 和 slapd 期间，我得到以下信息：
Setting up slapd (2.4.42+dfsg-2ubuntu3.2) ...
Moving old database directory to /var/backups:
- directory unknown... done.
Creating initial configuration... done.
Creating LDAP directory... done.
Job for slapd.service failed because the control process exited with error code. See "systemctl status slapd.service" and "journalctl -xe" for details.
invoke-rc.d: initscript slapd, action "start" failed.
● slapd.service - LSB: OpenLDAP standalone server (Lightweight Directory Access Protocol)
Loaded: loaded (/etc/init.d/slapd; bad; vendor preset: enabled)
Active: failed (Result: exit-code) since Fri 2018-06-01 15:04:58 CDT; 4ms ago
Docs: man:systemd-sysv-generator(8)
Process: 3107 ExecStart=/etc/init.d/slapd start (code=exited, status=1/FAILURE)
Jun 01 15:04:58 TBG-Magic systemd[1]: Starting LSB: OpenLDAP standalone server (Lightweight Directory Access Protocol)...
Jun 01 15:04:58 TBG-Magic slapd[3107]: * Starting OpenLDAP slapd
Jun 01 15:04:58 TBG-Magic slapd[3115]: @(#) $OpenLDAP: slapd (Ubuntu) (May 30 2017 19:20:53) $
buildd@lgw01-18:/build/openldap-JXEADB/openldap-2.4.42+dfsg/debian/build/servers/slapd
Jun 01 15:04:58 TBG-Magic slapd[3115]: daemon: bind(9) failed errno=98 (Address already in use)
Jun 01 15:04:58 TBG-Magic slapd[3107]: ...fail!
Jun 01 15:04:58 TBG-Magic systemd[1]: slapd.service: Control process exited, code=exited status=1
Jun 01 15:04:58 TBG-Magic systemd[1]: Failed to start LSB: OpenLDAP standalone server (Lightweight Directory Access Protocol).
Jun 01 15:04:58 TBG-Magic systemd[1]: slapd.service: Unit entered failed state.
Jun 01 15:04:58 TBG-Magic systemd[1]: slapd.service: Failed with result 'exit-code'.
dpkg: error processing package slapd (--configure):
subprocess installed post-installation script returned error exit status 1
Setting up ldap-utils (2.4.42+dfsg-2ubuntu3.2) ...
Processing triggers for libc-bin (2.23-0ubuntu10) ...
Processing triggers for systemd (229-4ubuntu21.2) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for ufw (0.35-0ubuntu2) ...
Rules updated for profile 'OpenSSH'
Skipped reloading firewall
Errors were encountered while processing:
slapd
E: Sub-process /usr/bin/dpkg returned an error code (1)
运行的日志journalctl -xe如下所示：
-- Subject: Unit slapd.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit slapd.service has begun starting up.
Jun 01 15:16:33 TBG-Magic slapd[7009]: * Starting OpenLDAP slapd
Jun 01 15:16:33 TBG-Magic slapd[7018]: @(#) $OpenLDAP: slapd (Ubuntu) (May 30 2017 19:20:53) $
buildd@lgw01-18:/build/openldap-JXEADB/openldap-2.4.42+dfsg/debian/build/servers/slapd
Jun 01 15:16:33 TBG-Magic slapd[7018]: daemon: bind(9) failed errno=98 (Address already in use)
Jun 01 15:16:33 TBG-Magic slapd[7018]: daemon: bind(9) failed errno=98 (Address already in use)
Jun 01 15:16:33 TBG-Magic slapd[7018]: slapd stopped.
Jun 01 15:16:33 TBG-Magic slapd[7018]: connections_destroy: nothing to destroy.
Jun 01 15:16:33 TBG-Magic slapd[7009]: ...fail!
Jun 01 15:16:33 TBG-Magic systemd[1]: slapd.service: Control process exited, code=exited status=1
Jun 01 15:16:33 TBG-Magic systemd[1]: Failed to start LSB: OpenLDAP standalone server (Lightweight Directory Access Protocol).
-- Subject: Unit slapd.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit slapd.service has failed.
--
-- The result is failed.
Jun 01 15:16:33 TBG-Magic systemd[1]: slapd.service: Unit entered failed state.
Jun 01 15:16:33 TBG-Magic systemd[1]: slapd.service: Failed with result 'exit-code'.
运行sudo apt-get remove --purge slapd并重新安装后。安装时我仍然遇到同样的错误。我该如何解决这个问题？