Failed to intstall mkusb

[pingball57]

I'm wanting to make a live USB to recover my other T--s--up laptop. Tried to follow the 'help' tutorial to create a persistent live USB. Following the commands to download & install mkusb I seem to have completed the addition of the repository but the second command results in the following return:
-SATELLITE-C850D-11Q:~$ sudo apt install --install-recommends mkusb mkusb-nox usb-pack-efi
Reading package lists... Done
Building dependency tree     
Reading state information... Done
E: Unable to locate package mkusb
E: Unable to locate package mkusb-nox
E: Unable to locate package usb-pack-efi

(Command was copied pasted directly from tutorial.) Now what do I do ??? ??

[Valtam]

What Tutorial?

[Linux CodeX]

link to tutorial>?

[pingball57]

The one Jerry & Moltke mentioned (I'm presuming) in this thread.
https://www.freecinema2022.gq/forums/insta...-live-usb/

This tutorial.
https://www.freecinema2022.gq/manual/tutor...ml#usbpers

[Valtam]

You're probably not already running 5.0 that's what the guide is for.

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