N1使用apt升级报错

feng***

apt update
apt upgrade
第一次报错/usr/bin/mandb: can't chmod /var/cache/man/es/CACHEDIR.TAG: Read-only file system

重启后，sudo dpkg --configure -a
报错/usr/bin/mandb: can't chmod /var/cache/man/tr/CACHEDIR.TAG: Operation not permitted和ln: failed to create hard link '/boot/initrd.img-5.0.2-aml-s905.dpkg-bak' => '/boot/initrd.img-5.0.2-aml-s905': Operation not permitted

请问这个是不是有问题

feng***

root@aml:~# hwclock --systohc  --debug
hwclock from util-linux 2.31.1
System Time: 1648987183.277288
Trying to open: /dev/rtc0
Trying to open: /dev/rtc
Trying to open: /dev/misc/rtc
No usable clock interface found.
hwclock: Cannot access the Hardware Clock via any known method.

feng***

系统是这个Armbian_5.77_Aml-s905_Ubuntu_bionic_default_5.0.2_20190401.img