I use MKUSB and it works brilliantly for eOS Loki persistent live. However, I cannot work out how to edit the boot menu... I can't find grub.cfg (which I've done before, but not on a MKUSB persistent live). Anyone have experience with this? Ideally I want to bypass the boot menu altogether, so it just boots straight to eOS on any system.
the configuration file is at:
How I found out where the files are:
By looking for the strings I see in the GRUB menu in the raw data on the USB drive, I found that the configuration files are located in a partition called "usbboot", which is FAT32 (the second partition in your screenshot, which is has a different name in your case, since I had this problem with Ubuntu).