Using E2B

E2B will boot a payload file depending on the file extension of the file selected. An iso file will have a .iso file extension and is thus booted in a different way from a file that has a .vhd file extension or a .img file extension.

E2B recognises a wide range of payload file extensions including special file extensions such as .isomem. .isopup, .isope, etc.

E2B and agFM and Ventoy will list the files in alphabetical order. E2B will recognise any three characters followed by an underscore as a special sequence and will not display those first four characters. It will also not display any characters after the two characters _. in the filename.

When you select a payload file from the E2B menu such as an iso or img file, E2B will look at the file name and extension and it may suggest an alternative file extension.

Easy2Boot QRUN.g4b batch file may suggest an alternative file extension.

In the example above, the archcraft ISO file was selected from the LINUX menu and E2B’s QRUN.g4b batch file was run.

You can override the default action by specifying the extension in the filename. For instance, if you found that a Puppy Linux required the .isopup file extension, then you can embed the correct file extension at the end of the filename, e.g. Puppy Linux_.isopup.iso. In this way Ventoy will still recognise the .iso file extension and list it in the Ventoy menu system.

If you allow the 6 second timeout to expire or you press ENTER and the ISO file boots correctly, then you can rename the payload file so that it does not show this prompt and it will boot immediately. Here are some ways you can rename the file:

  • archcraft-2022.02.02-x86_64.iso – unaltered – will always prompt you as shown above
  • archcraft-2022.02.02-x86_64.isodefault– E2B and agFM will not prompt (file will not be seen by Ventoy as extension is not valid)
  • archcraft-2022.02.02-x86_64_.isodef.iso – E2B and agFM will not prompt (file also works with Ventoy) (isodef is same as isodefault)
  • archcraft 2022.02.02 (32 and 64-bit)_.isodef.iso – E2B and agFM will not prompt (file also works with Ventoy) – filename has spaces
  • a01_archcraft 2022.02.02 (32 and 64-bit)_.isodef.iso – E2B and agFM will not prompt (file also works with Ventoy) – filename has spaces – a01_ and _.isodef are not displayed in E2B menu – see screenshot below:
E2B menu order, item appearance and action can be changed by changing the filename.
  • 001_xubuntu 8.10 desktop (64-bit)_.isodef64.iso – The ISO will only appear in the menu on a system with a 64-bit CPU

If you use the .isoask file extension it will always ask you to specify an alternate extension from a list (see section below).

QRUN options

  • ENTER – don’t wait for the 6 second timeout
  • I – same as using .isoask – prompt user
  • A – Abort – go back to E2B menu
  • .xxxxxx – QRUN will use whatever extension you type in (it must begin with a .)
  • N – same as allowing timeout to expire

If QRUN has not suggested an alternative file extension you can type I and press ENTER to see a list of alternative file extensions.

You can type BG or .isogrub to run the payload file as if it had a .isogrub file extension.

If you find a file extension that works, you can rename the file so that it uses that file extension automatically. For instance, if the ISO was a 64-bit Puppy Linux ISO and you find that it works correctly when typing IP, then you can rename the file as Puppy Linux (64-bit)_.isodef64.iso.

To change the order that the payload files are listed in by E2B, agFM and Ventoy, I suggest you use three characters followed by an underscore:

  • 000_Ubuntu v1_.isodef64.iso
  • 010_Ubuntu v2_.isodef64.iso
  • 800_Ubuntu v3_.isodef64.iso
  • a33_Ubuntu v4_.isodef64.iso

Note: The E2B menu will not display the first four characters or the last _.isodef64.iso part (but agFM and Ventoy will display the full filename).

Get the eBooks!

This website contains over 150 pages of information about Easy2Boot but a selection of easy-to-read eBooks are also available (in PDF format) (rated 4.5/5 stars by readers).
Learn the secrets of Legacy and UEFI USB booting and then make your perfect multiboot USB drive.
E2B eBook #1 includes instructions on how to remove the E2B blue 5-second start-up delay screen.

Most eBooks are over 100 pages long, contain original content and step-by-step exercises which are suitable for both the beginner or the more experienced user.
Customer reviews are located at bottom of each eBook product page and multi-buy discounts are available when you buy more than one eBook. Please also visit RMPrepUSB.com and the E2B Forum.
Subscribe to my blog for the latest news, tips, USB boot articles and free eBook updates.