到最后,出现这个
http://mirror.centos.org/centos/7/os/aarch64/images/pxeboot/vmlinuz... No such file or directory (https://ipxe.org/2d0c618e)
Could not boot: No such file or directory (https://ipxe.org/2d0c618e)
Could not boot: No such file or directory (https://ipxe.org/2d02808e)
Error occured, press any key to return to menu ...