/mnt/usb $lan/$netmask(rw,no_root_squash,insecure,sync,no_subtree_check)
# for arch pxe
/run/archiso/bootmnt $lan/$netmask(rw,no_root_squash,insecure,sync,no_subtree_check)
/mnt/usb $lan/$netmask(rw,no_root_squash,insecure,sync,no_subtree_check)
# for arch pxe
/run/archiso/bootmnt $lan/$netmask(rw,no_root_squash,insecure,sync,no_subtree_check)