There are different ways to make a LiveUSB in Linux, one of them is to use Unetbootin, of which KZKG ^ Gaara made a tutorial long time.
Another way to do it is with the terminal, in this way we are not installing little programs or chorraditas that what they do is take up space on the hard disk.
Let's go there:
Once we have the ISO downloaded, the first thing we do is enter the folder where we have the ISO with the terminal:
cd "carpeta donde tenemos la iso"
or (in case that form gives us an error)
cd /"carpeta donde tenemos la iso"
Once there we see the list of files to verify that we have not mistaken the folder:
ls
Now we do:
dd if=nombredelaiso.iso of=/dev/sdb
of = / dev / sdb It is the path of the USB device normally so before changing it I recommend trying like this, in case it does not work we already change it.