Here is a quick tutorial how to start Debian and probably other Debian based distros from a USB Hard Disk. With USB Flash Drive usually there is no need for any custom actions.
1) Once the installer complains for missing CDROM and asks to load CDROM drivers select NO:
You can get the available device names by pressing ALT+F2 to enter a new console and type:
ls /dev/
or
dmesg | grep disk
Just remember, it has to be the fourth partition, e.g. /dev/sda4.
Next press ALT+F1 to return to the Setup screen.





Practical advice that’s easy to implement. Much appreciated.
This was a very informative post. I appreciate the time you took to write it.
I wish I had read this sooner!
I tried your suggestion and it worked perfectly for me. Cheers!
I wasn’t expecting to learn so much from this post!
Thank you for being so generous with your knowledge.
Thank you for sharing this! I really enjoyed reading your perspective.
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I wish I had read this sooner!
Interesting point — do you have any sources where I can read more?