Nice Kevin. Thanks for your reply. This is what i get after your suggestion.
zimbra@dmrmail01:~> sh -x /opt/zimbra/bin/ldap start
+ PID=
+ PIDFILE=/opt/zimbra/openldap/var/run/slapd.pid
+ mkdir -p /opt/zimbra/openldap/var/run/
+ case "$1" in
+ start
+ checkrunning
+ getpid
+ '[' -f /opt/zimbra/openldap/var/run/slapd.pid ']'
+ '[' x = x ']'
+ RUNNING=0
+ '[' 0 = 0 ']'
+ '[' '!' -f /opt/zimbra/openldap-data/DB_CONFIG ']'
+ /opt/zimbra/libexec/zmconfigure /opt/zimbra/conf/slapd.conf.in /opt/zimbra/conf/slapd.conf
+ sudo /opt/zimbra/openldap-2.3.21/libexec/slapd -l LOCAL0 -4 -u zimbra -h ldap://:389/ -f /opt/zimbra/conf/slapd.conf
sudo: /etc/sudoers is mode 0440, should be 0640
+ sleep 2
+ getpid
+ '[' -f /opt/zimbra/openldap/var/run/slapd.pid ']'
+ '[' x = x ']'
+ echo 'ERROR - failed to start slapd'
ERROR - failed to start slapd
+ echo ''
+ exit 1 |