LDAP: How to add a person to an existing group?

Using command-line (Linux) or LDIF, I could find many examples of creating a new group and defining its members, but no examples of this:

How to add a user to an existing group?

Let's say the person also already exists.

For instance adding user uid=fred,ou=people,dc=example,dc=com to group cn=vipb,ou=groups,dc=example,dc=com.

Solution 1:

You add a memberUid attribute to the group. For example:

$ ldapmodify -D <admin DN> -h <ldaphost>
password: [enter password]
dn: cn=vipb,ou=groups,dc=example,dc=com
changetype: modify
add: memberUid
memberUid: fred

^D

For the record, the LDAP schema is described in RFC 2307.