Hi,
The problem is coming from the sed command present in
/var/lib/dpkg/info/libpam-yubico.postinst.
The problem is the secret key string is a base64 string, so it can contain some
slashes.
As slash is the separator of sed command:
sed -e "s/#DEBCONF_REPLACE/$RET/g"
sed fails because the slashes in $RET would need to be escaped.
A simple solution is to change the separator in the sed command by a pipe:
sed -e "s|#DEBCONF_REPLACE|$RET|g"
Fab
