怎么用debconf-set-selections命令处理这个界面

[unfurl]

OS: Ubuntu 12.04

想用Shell实现全自动安装，安装openswan出现这个界面，我尝试了很多办法，无法跳过这个界面
http://www.flickr.com/photos/saiq-xh/8034933746/

[unfurl]

root@ubuntu:~# debconf-get-selections | grep "openswan\/"
openswan openswan/existing_x509_rootca_filename string
openswan openswan/no-oe_include_file note
openswan openswan/existing_x509_key_filename string
openswan openswan/runlevel_changes note
openswan openswan/x509_state_name string
openswan openswan/x509_email_address string
openswan openswan/x509_country_code string AT
openswan openswan/x509_self_signed boolean true
openswan openswan/rsa_key_length string 2048
openswan openswan/restart boolean true
openswan openswan/existing_x509_certificate_filename string
openswan openswan/x509_common_name string
openswan openswan/install_x509_certificate boolean false
openswan openswan/x509_organizational_unit string
openswan openswan/x509_locality_name string
openswan openswan/how_to_get_x509_certificate select create
openswan openswan/x509_organization_name string