OpenLDAP

apt update
apt list --upgradable
apt install slapd ldap-utils

Configure

ldapwhoami -H ldap:// -x
dpkg-reconfigure slapd
ls -lah /var/backups/

phpLDAPadmin

apt install phpldapadmin
a2enmod proxy_fcgi setenvif
a2enconf php7.3-fpm

References

• Install and Configure OpenLDAP and phpLDAPadmin on Ubuntu 16.04
• Install an OpenLDAP Server in Ubuntu 20.04 with phpLDAPadmin
• Install OpenLDAP and phpLDAPadmin on Ubuntu 20.04 LTS
• Build LDAP Docker Image from Ubuntu