How's complete CLI steps in making an ISO archive, of a Linux system partition in any way (online or offline, etc), after which is used to make a bootable USB running the system live, and on Linuxes generally how is the working mechanism and rules/caveats of that process and accomplishment ?
Please help out
snapshot (https://wiki.archlinux.org/title/System_backup) is probably what you are looking for.
one easy method is to use dd (https://wiki.archlinux.org/title/Dd):
the method achieve that mentioned in wiki (https://wiki.archlinux.org/title/Dd#Disk_cloning_and_restore)