Break boot process before everything really starts
Sometimes, maybe after cloning a VM, you want to edit network settings and so on before your VM comes up with an IP address of the machine it is cloned from. In this moments a stop right after filesystems are mounted is a nice option. To do this you can put an additional option to the kernel options in grub during boot.
When grub shows up, navigate to your disired kernel and press e like edit. Find the line where the kernel is loaded (I always use ZFS so it looks like this at my installations):
linux "/BOOT/ubuntu_ocpr44@/vmlinuz-5.15.0-48-generic" root=ZFS="rpool/ROOT/ubuntu_ocpr44" ro init_on_alloc=0
add the option break=bottom to the options:
linux "/BOOT/ubuntu_ocpr44@/vmlinuz-5.15.0-48-generic" root=ZFS="rpool/ROOT/ubuntu_ocpr44" ro init_on_alloc=0 break=bottom
Press <ctrl>+<X> to boot tis setting.
After the initial boot process you will dropped into the initramfs shell:
At this point your root filesystem is mounted to /root so to edit network settings you need to modify the files under /root/etc/netplan.
(initramfs) vi /root/etc/netplan/ens160.yaml
To have always your favorite editor in your initramfs take a look at initramfs#Adding vi to initramfs