libpam-ldap packages as examples.
Even when installed with
apt-get --force-yes they still ask questions:
acroreadwants to know whether acrobat should be the standard PDF reader (how to assume yes?)
libpam-ldapWhat's your LDAP-Servers URI, version, password, …? (how to just assume anything, the
ldap.confwill be overwritten by puppet anyway)
Is there a "for god's sake assume anything and stop nagging"-switch for