I've been trying to install 14.04.1 Server using a bootable USB created using Rufus.
It has installed perfectly well on one machine, but on the next machine, which is ostensibly exactly the same hardware components, it keeps failing at the 'install software' stage.
I've retried a few times, re-made the bootable USB, downloaded the image again and all sorts! I've run memory tests, and changed the hard drive which made no difference. Once it even teased me by completing the software install, but failed to install grub.
I've used the 'test disc for defects' option, which normally returns './install/netboot/ubuntu-installer/i386/pxelinux.cfg/default has failed MD5checksum verification, the file or disc may be corrupt.' Though I'm not sure whether the fact it's on the bootable USB may be affecting this.
The image was downloaded on a windows 7 PC, though I'm not sure this is relevant.
It is also the only OS being installed on the host.
I appreciate that I've included a lot of background info, which may be irrelevant or confusing. The crux of my question is:
How can I independently verify whether the downloaded iso image is corrupt?