The following error message occurs with current versions of the DELL Smart Bootable ISO:
Unable to read public file /usr/libexec/dell/ Parsing configuration File Enter passphrase for encrypted config File
This prompt can simply be ignored by pressing Enter and the Dell Smart Bootable ISO will start updating the server.
What is a Smart Bootable ISO?
The Smart Bootable ISO is created with the DELL Repository Manager and offers the possibility to update all firmware, except the power supplies, using a bootable USB stick.