Contents
How to make a preseeding file in Ubuntu?
This is normally done by editing the bootloader configuration file (e.g. parmfile.ubuntu) and adding the parameter to the end (however, the file is empty by default). To make sure the installer gets the right preconfiguration file, you can optionally specify a checksum for the file.
How to set Boot timeout for preseeding-Ubuntu?
If you do specify the preconfiguration file in the bootloader configuration, you might change the configuration so you don’t need to hit enter to boot the installer. For syslinux this means setting the timeout to 1in syslinux.cfg. To make sure the installer gets the right preconfiguration file, you can optionally specify a checksum for the file.
How to create a preconfiguration file for Ubuntu?
Creating the preconfiguration file is covered later in this appendix. Putting it in the correct location is fairly straightforward for network preseeding or if you want to read the file off a floppy or usb-stick. If you want to include the file on a CD or DVD, you will have to remaster the ISO image.
Can a preconfiguration file be used for preseed?
If a preconfiguration file cannot be used to preseed some steps, the install can still be fully automated, since you can pass preseed values on the command line when booting the installer. Boot parameters can also be used if you do not really want to use preseeding, but just want to provide an answer for a specific question.
Is there a way to presee an Ubuntu install?
The key to preseeding, of course, is to know what those values are. There are a number of good online guides for preseeding, but I’ve noticed that most of them, even those for Ubuntu, still seem to provide Debian-based examples. The main way to discover all of the available preseeding options is to use debconf-get-selections.
How to find the preseed settings in Ubuntu?
The main way to discover all of the available preseeding options is to use debconf-get-selections. For instance, to find out all of the current preseed settings from your current install, you would run This would dump all of the installation-focused preseeding options into alloptions.cfg.
What are the templates for preseed in Debian?
Preseeding and the installer’s debconf templates. As part of its construction the Debian Installer uses udeb files. These files are similar to normal .debs and have a control section which may contain a file called templates which, amongst other things, contains questions which can be asked during the installation.
Where is the default directory for preseed in Ubuntu?
The last part of that url (d-i/focal/./preseed.cfg) is taken from auto-install/defaultroot. By default this includes the directory focalto allow future versions to specify their own codename and let people migrate forwards in a controlled manner.
What happens if you don’t presee a question?
If you don’t specify the owner, the value for the variable will not be copied to the debconf database in the target system and thus remain unused during the configuration of the relevant package. Normally, preseeding a question in this way will mean that the question will not be asked.