Looks like BerkeleyDB is not installed which is required to configured openLDAP.
Follow the below steps to install BerkeleyDB.
Downloading Berkeley DB
wget http://download.oracle.com/berkeley-db/db-5.2.28.tar.gz
Extracting files from the downloaded package:
tar zxvf db-5.2.28.tar.gz
cd db-5.2.28/build_unix
Create installation path
mkdir /etc/berkeleydb
Configuring Berkeley DB
../dist/configure --prefix=/etc/berkeleydb
Compile and install the code
make
make install
OpenLDAP is an open source implementation of LDAP or Lightweight Directory Access Protocol . OpenLDAP allows to store and organize user related data centrally. OpenLDAP functions like a relational database & can store any data but its normally used as a address book. Its used for authenticating and authorizing of the users. Information stored in OpenLDAP is in hierarchical manner & We can group the users into a single or multiple groups based on necessity.
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