First I zeroed out the entire USB flash drive:
dd if=/dev/zero of=/dev/sdb
And then I used
fdisk(8) to create a type
c W95 FAT32 (LBA) partition on it and formatted the partition as FAT32:
mkfs -t vfat /dev/sdb1
And then I used Ubuntu Startup Disk Creator to make it a bootable Ubuntu USB stick (the .iso file is verified and not at fault). However, whenever I use the drive to boot I get a
Boot error message. What's going wrong? How to fix this?
Edit: No other distributions (Fedora, Debian, etc.) on other bootable USB disk creators (UnetBootin, etc.) work. The tool runs on Ubuntu 15.10; the file used is of Ubuntu 15.10.