I was having this same issue trying to install Ubuntu on my 2008 HP laptop. Make sure USB is formatted FAT32 or NTFS first. I actually tried both with no success. I also tried a few different Linux distros and multiple Linux USB creators. All gave me the same message on boot. After tinkering with the BIOS and boot order, I finally gave up and decided to blame HP, since all the boot USBs I made worked fine on my desktop pc.
I finally decided to burn the ISO to a DVD and try to boot from my external USB cd/DVD drive and everything worked fine!
You can use dd.
sudo umount /dev/sd<?><?>
where <?><?> is a letter followed by a number, look it up by running lsblk.
It will look something like
sdb 8:16 1 14.9G 0 disk
├─sdb1 8:17 1 1.6G 0 part /media/username/usb volume name
└─sdb2 8:18 1 2.4M 0 part
I would dismount sdb1.
Then, next (this is a destructive command and wipes the entire USB drive with the contents of the iso, so be careful):
sudo dd bs=4M if=path/to/input.iso of=/dev/sd<?> conv=fdatasync status=progress
where input.iso is the input file, and /dev/sd<?> is the USB device you're writing to (run lsblk to see all drives to find out what <?> is for your USB).
This method is fast and has never failed me.
EDIT: for those on a Mac ending up here, use lowercase for bs=4m:
sudo dd if=inputfile.img of=/dev/disk<?> bs=4m && sync
EDIT: If USB drive does not boot (this happened to me), it is because the target is a particular partition on the drive instead of the drive. So the target needs to be /dev/sdc and not dev/sdc <?> For me it was /dev/sdb .
Reference: https://superuser.com/a/407327 and https://askubuntu.com/a/579615/669976
Best Answer
Try UnetBootin. Worked everytime for me.
Install by :-
And, always use as root