sudo mkdir -p ~/rpi_mnt
pi@raspberrypi4:~ $ sudo losetup -f -P --show /mnt/runimg/new_raspberry1_srerver_min.img
/dev/loop0
pi@raspberrypi4:~ $ sudo mount /dev/loop0p2 -o rw ~/rpi_mnt
pi@raspberrypi4:~ $ cd ~/rpi_mnt
pi@raspberrypi4:~/rpi_mnt $ sudo mount --bind /dev ~/rpi_mnt/dev/
pi@raspberrypi4:~/rpi_mnt $ sudo mount --bind /sys ~/rpi_mnt/sys/
pi@raspberrypi4:~/rpi_mnt $ sudo mount --bind /proc ~/rpi_mnt/proc/
pi@raspberrypi4:~/rpi_mnt $ sudo mount --bind /dev/pts ~/rpi_mnt/dev/pts
pi@raspberrypi4:~/rpi_mnt $ sudo mkdir -p  /media/netdir/source/raspberrypi/4-07
pi@raspberrypi4:~/rpi_mnt $ sudo mkdir -p  ~/rpi_mnt/mnt/compile
pi@raspberrypi4:~/rpi_mnt $ sudo mount  --bind  /media/netdir/source/raspberrypi/4-07 ~/rpi_mnt/mnt/compile
pi@raspberrypi4:~/rpi_mnt $ cd ~/rpi_mnt
pi@raspberrypi4:~/rpi_mnt $ sudo chroot . bin/bash
root@raspberrypi4:/# 
root@raspberrypi4:/# ls -l
total 88
drwxr-xr-x   2 root   root  4096 Sep 26 09:14 bin
drwxr-xr-x   2 root   root  4096 Jan  2 22:41 boot
drwxr-xr-x  17 root   root  3960 Jan  4 22:44 dev
drwxr-xr-x 114 root   root 12288 Jan  3 18:21 etc
drwxr-xr-x   3 root   root  4096 Sep 26 09:09 home
drwxr-xr-x  16 root   root  4096 Jan  3 17:44 lib
drwx------   2 root   root 16384 Sep 26 09:30 lost+found
drwxr-xr-x   2 root   root  4096 Sep 26 09:05 media
drwxr-xr-x   6 root   root  4096 Jan  3 18:21 mnt
drwxr-xr-x   4 root   root  4096 Sep 26 09:16 opt
dr-xr-xr-x 150 root   root     0 Jan  1  1970 proc
drwx------   5 root   root  4096 Jan  3 18:21 root
drwxr-xr-x   4 root   root  4096 Sep 26 09:05 run
drwxr-xr-x   2 root   root  4096 Jan  3 17:44 sbin
drwxr-xr-x   3 root   root  4096 Jan  3 18:21 srv
dr-xr-xr-x  12 root   root     0 Jan  4 22:39 sys
dr-xr-xr-x   9 nobody root  4096 Jan  3 18:21 tftpboot
drwxrwxrwt   7 root   root  4096 Jan  4 13:33 tmp
drwxr-xr-x  11 root   root  4096 Sep 26 09:15 usr
drwxr-xr-x  11 root   root  4096 Sep 26 09:31 var
root@raspberrypi4:/# echo 00:00:00
00:00:00
root@raspberrypi4:/# date
Sat 04 Jan 2020 10:44:16 PM JST
root@raspberrypi4:/# 
root@raspberrypi4:/# 
root@raspberrypi4:/# ls -l /etc/samba/smb.conf
-rw-r--r-- 1 root root 53904 Jan  3 17:25 /etc/samba/smb.conf
root@raspberrypi4:/# 
root@raspberrypi4:/# rm -f /etc/samba/smb.conf
root@raspberrypi4:/# cd /etc/samba/
root@raspberrypi4:/etc/samba# scp -p pi@raspberry1:/etc/samba/smb.conf ./
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
SHA256:WroIin668/UrRMpq7czcjhKghPBV2E7L29t5yclz84M.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /root/.ssh/known_hosts:3
  remove with:
  ssh-keygen -f "/root/.ssh/known_hosts" -R "raspberry1"
ECDSA host key for raspberry1 has changed and you have requested strict checking.
Host key verification failed.
root@raspberrypi4:/etc/samba# ssh-keygen -f "/root/.ssh/known_hosts" -R "raspberry1"
# Host raspberry1 found: line 3
/root/.ssh/known_hosts updated.
Original contents retained as /root/.ssh/known_hosts.old
root@raspberrypi4:/etc/samba# ssh-keygen -f "/root/.ssh/known_hosts" -R "raspberry1"cp -p pi@raspberry1:/etc/samba/smb.conf ./
The authenticity of host 'raspberry1 (192.168.1.251)' can't be established.
ECDSA key fingerprint is SHA256:WroIin668/UrRMpq7czcjhKghPBV2E7L29t5yclz84M.
Are you sure you want to continue connecting (yes/no)? 
Host key verification failed.
root@raspberrypi4:/etc/samba# scp -p pi@raspberry1:/etc/samba/smb.conf ./
The authenticity of host 'raspberry1 (192.168.1.251)' can't be established.
ECDSA key fingerprint is SHA256:WroIin668/UrRMpq7czcjhKghPBV2E7L29t5yclz84M.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'raspberry1' (ECDSA) to the list of known hosts.
Warning: the ECDSA host key for 'raspberry1' differs from the key for the IP address '192.168.1.251'
Offending key for IP in /root/.ssh/known_hosts:3
Are you sure you want to continue connecting (yes/no)? yes
pi@raspberry1's password: 
smb.conf                                                                                0%    0     0.0KB/s   --:-- ETAsmb.conf                                                                              100%   10KB   5.0MB/s   00:00    
root@raspberrypi4:/etc/samba# ls -l /etc/samba/smb.conf
-rw-r--r-- 1 root root 10538 Jan  4 15:14 /etc/samba/smb.conf
root@raspberrypi4:/etc/samba# df -hT
Filesystem                                     Type      Size  Used Avail Use% Mounted on
/dev/loop0p2                                   ext4      3.7G  3.5G   81M  98% /
udev                                           devtmpfs  1.8G     0  1.8G   0% /dev
nas-27-59-FD:/data/tmp/source/raspberrypi/4-07 nfs       5.5T  3.7T  1.9T  67% /mnt/compile
root@raspberrypi4:/etc/samba# 
root@raspberrypi4:/etc/samba# compile finish
bash: compile: command not found
root@raspberrypi4:/etc/samba# exit
exit
pi@raspberrypi4:~/rpi_mnt $ cd 
pi@raspberrypi4:~ $ sudo umount  ~/rpi_mnt/mnt/compile
pi@raspberrypi4:~ $ sudo umount  ~/rpi_mnt/dev/pts
pi@raspberrypi4:~ $ sudo umount  ~/rpi_mnt/proc
pi@raspberrypi4:~ $ sudo umount  ~/rpi_mnt/sys
pi@raspberrypi4:~ $ sudo umount  ~/rpi_mnt/dev
pi@raspberrypi4:~ $ sudo umount  ~/rpi_mnt
pi@raspberrypi4:~ $ sudo losetup -d  /dev/loop0
pi@raspberrypi4:~ $