If Zorin uses grub, you can set init=/bin/sh in the grub command line. You will get a root shell in rescue mode, with the root partition in read-only mode. You can then mount the root partition as read-write, set the user password using the passwd comand, mount read-only again, and reboot.
By setting init=/bin/sh in the editable grub command line. You can google how to get there exactly. This directly starts a root shell instead of the normal init process. (it is also in the raspberrytips link that were already linked in another comment).
To note: This also means that anybody who has physical access to your console during bootup can root the system. If you do not want that, you need to set a harddisk encryption password (and optionally also a BIOS password, but the latter won´t protect e.g. against disassembling the computer and putting the HDD into another Linux box).
If Zorin uses grub, you can set
init=/bin/shin the grub command line. You will get a root shell in rescue mode, with the root partition in read-only mode. You can then mount the root partition as read-write, set the user password using thepasswdcomand, mount read-only again, and reboot.How do you startup into the cl?
By setting
init=/bin/shin the editable grub command line. You can google how to get there exactly. This directly starts a root shell instead of the normal init process. (it is also in the raspberrytips link that were already linked in another comment).To note: This also means that anybody who has physical access to your console during bootup can root the system. If you do not want that, you need to set a harddisk encryption password (and optionally also a BIOS password, but the latter won´t protect e.g. against disassembling the computer and putting the HDD into another Linux box).