Pretty much all Linux distros are available as .iso "LiveCD" images, so just download one of those (eg. Linux Mint), and use whatever CD/DVD burning software you have to put it onto a DVD or CD disc.

With a computer already running Linux, I would instead just throw the raw .iso file onto a USB stick, and then boot/run from that on the target system afterward.

cat linuxmint.iso > /dev/sdb ## assuming /dev/sdb is the non-mounted stick

Dunno how to do that from MS-Windows though. One problem you'll have is that the .iso Linux distro won't have the lsscsi command by default. If you use Linux Mint, then after booting up, you can install the missing command before doing the rest with this:

sudo apt-get install lsscsi ## requires a network connection