Create a live USB with 2 partitions

Verify the ISO

sha256sum debian-live-9.0.1-amd64-gnome.iso
less SHA256SUMS

Then verify the SHA256SUMS file

> gpg --verify SHA256SUMS.sign 
gpg: Signature made Wed 21 Jun 2017 10:45:45 AM CEST using RSA key ID 6294BE9B

gpg: Can't check signature: No public key

Get the key

> gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 6294BE9B

srubio@pc261:/homelocal/BACKUPS/ISOs> gpg --verify SHA256SUMS.sign SHA256SUMS
gpg: Signature made Wed 21 Jun 2017 10:45:45 AM CEST using RSA key ID 6294BE9B
gpg: Good signature from "Debian CD signing key <debian-cd@lists.debian.org>" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
Primary key fingerprint: DF9B 9C49 EAA9 2984 3258  9D76 DA87 E80D 6294 BE9B

srubio@pc261:/homelocal/BACKUPS/ISOs> 

Burn the ISO

# Delete partitions

# dd if=/dev/zero of=/dev/sdb bs=4M count=1

# Create the new ones:

fdisk /dev/sdb

> n

> p (use primary)

> 1 (+10GB)

> t

> c (filesystem type, FAT32 LBA)

> n

> p (primary)

> 2 (defaults)

> t (specify 2nd partition)

> c (filesystem type)

> a (set bootable)

> 1 (toggles boot flag)

> p (print new partition table)

> w (write the new table and quit)

# Create the filesystems:

mkfs.vfat -n usblinux /dev/sdb1

mkfs.vfat -n portable /dev/sdb2

# Use mlabel -i :: for just renaming

Then write your image to the disk

sudo dd bs=4M if=../openSUSE-Leap-42.1-DVD-x86_64.iso of=/dev/sdb1 && sync