On Mon, Nov 20, 2023 at 08:59:02AM +0000, Tom Furie wrote: > Zenaan Harkness <zen...@gmail.com> writes: > > > Attempting a fresh Debian stable install with > > debian-12.2.0-amd64-netinst.iso (latest default amd64 boot image), `cp > > deiban-...iso /dev/sdX; sync`, and rebooted to the usb stick with the > > You can't just copy the iso to the stick and get it to boot.
Actually... if you copy to the whole device (not to a partition), as OP seems to have done, it should work. The only advantage of dd over cp is that you have more control over the buffer cache (oflag=sync). > This stick > must have already had an image written to it, the leftovers of which is > getting as far as GRUB. ...no: all blocks of the block device get overwritten, including the boot loader. > I noticed you posted a follow-up saying you're on Ubuntu - in which case > you should be able to use dd to write the image to the stick. Cp should be the same than dd; with dd you can control block size (with sticks, my experience is that bs=1M is much faster than the default of 512), turn off buffer cache (oflag=sync), so no more waiting for a sync to come back without knowing how long it's going to take) and a progress indicator (status=progress), which is nice. The result should be the same (if you wait for sync to finish its job, that is). Cheers -- t
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