> sudo aptitude install slapd
The following partially installed packages will be configured:
  slapd
No packages will be installed, upgraded, or removed.
0 packages upgraded, 0 newly installed, 0 to remove and 6 not upgraded.
Need to get 0 B of archives. After unpacking 0 B will be used.
Setting up slapd (2.4.23-7) ...
  Creating initial configuration... Loading the initial configuration from the ldif file () failed with
the following error while running slapadd:
    str2entry: invalid value for attributeType olcSuffix #0 (syntax 1.3.6.1.4.1.1466.115.121.1.12)
    slapadd: could not parse entry (line=1052)
dpkg: error processing slapd (--configure):
 subprocess installed post-installation script returned error exit status 1
configured to not write apport reports
                                      Errors were encountered while processing:
 slapd
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
Setting up slapd (2.4.23-7) ...
  Creating initial configuration... mkdir: cannot create directory `/etc/ldap/slapd.d': File exists
dpkg: error processing slapd (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 slapd