LDAP is a good way to manage users and set-up the limited-privilege. LDAP is Lightweight Directory Access Protocol. You can find full information in the wikipedia. People can easily set-up LDAP on the Windows server. However, you have to pay licence fee for windows machine. So, we have another choice — OpenLDAP. For management LDAP we can use an open source software — PhpLDAPAdmin, which based on PHP and web. This means that you can use browser to manage your LDAP.
In this guide, we will install OpenLDAP and PhpLDAPAdmin on the EC2 Ubuntu server.