@AppLee
thank you
cp config config.bak .It's my habit

@Keneda
I read it before I posted the issue .
no help
sshd_config.d does not exist
50-lxc-android-config.conf does not exist

searching google bing , tried again and again, hope to get it working。
every night at least 5 hours,
No results.

I have five pc and one server and Raspberry Pi orange pi .....
running armbian debian centos pve nasos
all very easy by ssh
ubrtouch not

@ubtouch 16.04

sudo su root
mount -o remount rw /
cd /userdata

dd bs=1M count=6000 if=/dev/zero of=system2.img
losetup -f --show system2.img
#return loop2
( loop0----system.img loop2----system2.img )

dd if=/dev/loop0 of=/dev/loop2
resize2fs /dev/loop2
mv system.img system.old
mv system2.img system.img

reboot

#enjoy it