sed -i "s|^\(eval.\+\)$|#\1|g"   /home/pi/vdesktop/vdesktop 
pi@raspberry48:~ $ sed -i "s|^\(export DISPLAY.\+\)$|#\1|g"  /home/pi/vdesktop/profile
pi@raspberry48:~ $ sed -i "s|^\(eval.\+\)$|#\1|g"  /home/pi/vdesktop/profile
pi@raspberry48:~ $ sed -i "s|^\(sleep.\+\)$|#\1|g"  /home/pi/vdesktop/profile
pi@raspberry48:~ $ sed -i "s|^\(lxpanelctl.\+\)$|#\1|g"  /home/pi/vdesktop/profile
pi@raspberry48:~ $ ls -l /media/netdir/source/raspberrypi
total 0
drwxrwxrwx+ 1 systemd-network users 18 Dec  6 19:53 3
drwxrwxrwx+ 1              99    99 18 Feb  9 21:53 4-01_rasp
drwxrwxrwx+ 1              99    99 18 Feb 10 18:45 4-02_readynas
drwxrwxrwx+ 1 root            root  18 Mar  4 20:08 4-04_docker_readynas
drwxrwxrwx+ 1 root            root  18 Mar  4 21:58 4-05_chroot_readynas
drwxrwxrwx+ 1              99    99 18 Dec  6 19:46 org
pi@raspberry48:~ $ mkdir -p  /media/netdir/source/raspberrypi/4-05_chroot_readynas
pi@raspberry48:~ $ inset_line=`grep -n systemd-nspawn   /home/pi/vdesktop/vdesktop  |  tail -1 | cut -f 1  -d:`
pi@raspberry48:~ $ let inset_line2=inset_line+1
pi@raspberry48:~ $ sed -i  "${inset_line2}iumount  \${mntpnt}/mnt/compile"  /home/pi/vdesktop/vdesktop 
pi@raspberry48:~ $ sed -i  "${inset_line}imount  --bind  /media/netdir/source/raspberrypi/4-05_chroot_readynas  \${mntpnt}/mnt/compile"  /home/pi/vdesktop/vdesktop 
pi@raspberry48:~ $ sed -i  "${inset_line}imkdir -p  \${mntpnt}/mnt/compile"  /home/pi/vdesktop/vdesktop 
pi@raspberry48:~ $ ls -l /mnt/runimg
total 18797568
-rwxrwxrwx+ 1               99   99 4555014144 Jan  7 22:32 2019-04-08-raspbian-stretch_chroot.img
-rwxrwxrwx+ 1 systemd-timesync   98 3481272320 Feb  9 23:45 2019-04-08-raspbian-stretch-make-new.img
-rwxrwxrwx+ 1 root             root 3481272320 Dec 30 09:55 2019-04-08-raspbian-stretch-make-old.img
-rwx------+ 1               99   99 3829399552 Jan 26 21:38 2019-09-26-raspbian-buster_jin.img
drwxrwxrwx+ 1 root             root        160 Dec 19 22:41 bak
-rw-rw-rw-+ 1               99   99 1728053248 Mar  5 00:10 readynas_compile_tool2.img
-rw-rw-rw-+ 1               99   99 2173698048 Jan  8 23:25 readynas_compile_tool.img
pi@raspberry48:~ $ sudo /home/pi/vdesktop/vdesktop /mnt/runimg/2019-04-08-raspbian-stretch-make-new.img
Message from Botspot: Questions or suggestions? 
https://www.raspberrypi.org/forums/viewtopic.php?&t=251757
OK, looks like you specified a disk image.
/dev/loop0
mount: /media/pi/vdesktop: mount point does not exist.
mount: /media/pi/vdesktop/boot: mount point does not exist.
mount: /media/pi/vdesktop: mount point does not exist.
diff: /media/pi/vdesktop/etc/machine-id: No such file or directory
Your cursor color will be blue until the container is terminated.
Booting in 5 seconds.


Directory /media/pi/vdesktop doesn't look like an OS root directory (os-release file is missing). Refusing.

The machine has exited, but you can still access the guest. Press Ctrl+C to unmount /media/pi/vdesktop
^C
Preparing to exit...
Unmounted and exiting...

pi@raspberry48:~ $ 
pi@raspberry48:~ $ 
pi@raspberry48:~ $