How to create bootable USB thumb drive with iso file

[Ralf Mardorf]

On Wed, 29 Apr 2020 11:56:06 +0100, Ian Bruntlett wrote:
>One thing I always do is download the corresponding MD5SUMS file for
>each iso, using the md5sum command to verify the integrity of the iso
>file.

Hi,

you always should download SHA256SUMS and SHA256SUMS.gpg to check
complete integrity against a signed SHA256 checksum.

Since I plan to make a dual-boot USB stick with NomadBSD and BlackArch
Linux, if possible at all. I stumbled over this issue:

https://forum.nomadbsd.org/t/integrity-check-of-images/125

Btw. my first plan was trying to make a dual-boot USB stick with
NomadBSD and Lubuntu, but it would be too nasty to get the same tools
and "jokes" such as 42zip, a recursive Zip archive bomb. 
https://packages.ubuntu.com does return different software for the
abbreviation "dos", than what I expect.

The signed checksums for Lubuntu and Ubuntu 20.04:
http://cdimage.ubuntu.com/lubuntu/releases/20.04/release/
http://releases.ubuntu.com/20.04/

Regards,
Ralf