I'm glad I found a thread on this that wasn't too old. I have a Dell R510 1.12 BIOS. I've created a bootable USB using RUFUS 2.18,1213 putting the linuxlso.iso file from the BootableISO_2017-10-16_10-07-47 download from Dell. Booting to the USB gives me the "apply bundles.sh is invalid" error. Going through the manual mount process. the lsblk command shows the mount device to be sde. So, I mount /dev/sde /opt/dell/toolkit/systems and hit enter. I'm not Linux expert, but the message returned from the mount command doesn't seem right. That message is: