Make sure this shared library resides on the same server machine that the Sun Java System Directory Server is installed on.
Make sure you know the Directory Manager password.
Modify the libdigest-plugin.ldif file changing all references to the /path/to to the location where you installed the digest plug-in shared library.
libdigest-plugin.ldif is available at server-root/plugins/digest/libdigest-plugin.ldif.
To install the plug-in, enter the following command:
% ldapmodify -D "cn=Directory Manager" -w password -a < libdigest-plugin.ldif