I prepare a stick with

dd if=mini.iso of=/dev/sdX bs=4M; sync

and try to uefi boot it.
This works well with the debian stretch mini.iso, but not with bionic beaver mini.iso (md5sum 8388f7232b400bdc80279668847f90da).
Also I get strange result when checking the mini.iso image or/and the stick with testdisk.


  • 1
    Welcome to AskUbuntu! Your command isn't formed properly. Have you considered specifying the mini.iso as an input file? Please see man dd – Elder Geek Jun 19 '18 at 12:17
  • Did they modify the mini iso to be UEFI bootable? The older versions were not UEFI capable. Most used server and did not add much if anything with its tasksel which adds software. – oldfred Jun 19 '18 at 15:05
  • Yes, the 18.04 mini.iso is uefi bootable when started from cd. (Elder Geek, I also corrected the typo in the command, thank you!) – Johann Veterinarius Jun 21 '18 at 7:03
  • Please refer to askubuntu.com/questions/738305/… for further discussion and to onetransistor.eu/2015/12/… for a possible qorkaround – Wladimir Mutel Dec 10 '18 at 11:30
  • @JohannVeterinarius, Please post a link where an uefi bootable Ubuntu mini.iso can be downloaded. – sudodus Dec 10 '18 at 13:41

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