The commands:
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qemu -soundhw es1370 -cdrom knoppix-std-0.1.iso
tar -xvf freebsd6.1rel.qcow.img20060526.tar
cd freebsd6.1rel.qcow.img
qemu-img info freebsd6.1rel.qcow.img
cat README
qemu freebsd6.1rel.qcow.img
The Links:
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https://fabrice.bellard.free.fr/qemu/
https://www.oszoo.org/wiki/index.php/Category:OS_images
https://www.knoppix-std.org/download.html