How to edit the size of the /boot partition when installing Ubuntu? Using the guided partitioning option "use the entire disk and set up encrypted LVM" results is a /boot partition which is only 236MB.

  • AFAIK, it can't be done via that option; you should consider using the "Something Else" option instead, as described here (among many other places). FWIW, this bug report identifies a too-small /boot partition as a problem. If you agree, please click the link that identifies you as being affected, and perhaps add a comment. – Rod Smith Jul 31 '15 at 2:14

Guided partition sizes are specified in /lib/partman/recipes[-arch]/*. The file format is here: http://ftp.dc.volia.com/pub/debian/preseed/partman-auto-recipe.txt

To increase the /boot size, change the maximum size (third number) in the boot section of the default recipe: sudo nano /lib/partman/recipes/30atomic


128 512 256 ext2
    mountpoint{ /boot } .


Change the 256 to a something bigger and save. Then, start the installer and use the guided option.


Use manual partitioning and try the steps I outline in this solution. The process I use is for Ubuntu 16.04.2 though. With manual partitioning, I was able to create a boot partition 1GB in size with no problem. As an added benefit, you can also create additional logical volumes for /home or any other partition you might want to keep separate.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.