Create a bootable USB stick using dd

Here are the commands I used to create a bootable USB stick which contains Ubuntu 22.04 LTS.

Step 1: Show list of block devices to determine the USB device:

lsblk

Step 2: Make filesystem on USB device (assuming USB device is sdb):

sudo mkfs.vfat /dev/sdb

I used `-I` to ignore safety checks after mkfs told me that there are partitions or virtual mappings on the device:

sudo mkfs.vfat -I /dev/sdb

Step 3: Copy ISO data to USB device (assuming USB device is sdb):

sudo dd bs=4M if=/path/to/ubuntu-22.04.1-desktop-amd64.iso of=/dev/sdb conv=fdatasync status=progress

The argument `conv=fdatasync` is used to ensure that the iso file is physically written to the device before finishing.

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