failed running 'chroot '

With 3 roots on 3 disks
One with ubuntu 16/10
One with xubuntu 16.10
The last with linuxmint 16.04
it apair on the last root directory
Grub Customizer is install on the 3 systems
Olivier

The error message says that the grubcfg_proxy is missing. This is a small part of grub customizer used to filter the original configuration when running grub-mkconfig or update-grub. Usually it is copied from /usr/lib/grub-customizer/grubcfg_proxy to /etc/grub.d/bin/grubcfg_proxy if the modifications done with grub customizer are requiring that filter (this is the case for most of the menuentry changes).

Now the question is: Why isn't it copied properly.

I need some more output of Grub Customizer.

Run Grub Customizer from terminal using the command `sudo grub-customizer verbose` and paste the terminal output here please.

I'm running into this issue today. I just installed grub-customizer, the "About" screen shows v5.1.0.

I'm not sure the `verbose` option provides any additional useful output, but FWIW here it is:

```
 -> main/refresh-tab

 -> main/save

 *** writing settings file
     [font file exists]
 -> theme/save

 *** writing grub list configuration
 -> theme/post-save
  -> settings/sync
   -> settings/sync
   -> theme/update-font-size
  -> theme/update-font-size

 -> main/sync-save-state
     [running MainControllerImpl::syncListView_save]
     [MainControllerImpl::syncListView_save completed]

 -> main/sync-save-state
     [running MainControllerImpl::syncListView_save]
     [MainControllerImpl::syncListView_save completed]

 -> main/sync-save-state
     [running MainControllerImpl::syncListView_save]
     [MainControllerImpl::syncListView_save completed]

     [Generating grub configuration file ...]
 -> main/sync-save-state
     [running MainControllerImpl::syncListView_save]
     [MainControllerImpl::syncListView_save completed]

     [using custom appearance settings]
 -> main/sync-save-state
     [running MainControllerImpl::syncListView_save]
     [MainControllerImpl::syncListView_save completed]

     [/etc/grub.d/06_linux_proxy: 3: /etc/grub.d/06_linux_proxy: /etc/grub.d/bin/grubcfg_proxy: not found]
 -> main/sync-save-state
     [running MainControllerImpl::syncListView_save]
     [MainControllerImpl::syncListView_save completed]

     [cat: write error: Broken pipe]
 -> main/sync-save-state
     [running MainControllerImpl::syncListView_save]
     [MainControllerImpl::syncListView_save completed]

 -> main/sync-save-state
     [running MainControllerImpl::syncListView_save]
     [MainControllerImpl::syncListView_save completed]

Gtk-Message: 16:24:10.462: GtkDialog mapped without a transient parent. This is discouraged.
 -> main/exit
```

My main Ubuntu installation/current environment is on /dev/sda5; the grub configuration I'm attempting to modify is on a USB stick on /dev/sdb1 (formatted ext2, if that matters).

The error message says that /etc/grub.d/bin/grubcfg_proxy was not found. However it may be just not executable from your live environment because of incompatible executable formats (you cannot operate on a 64 bit system when using 32 bit live distro)

Please try:
sudo mount /dev/sda5 /mnt
sudo ls /mnt/etc/grub.d/bin/grubcfg_proxy
echo 123 | sudo /mnt/etc/grub.d/bin/grubcfg_proxy "+*"
sudo umount /mnt

I'm doing it the other way around; the USB stick (which has a full 32-bit Debian install, not just a live distro) is what I'm trying to edit, and I'm running from my Ubuntu 64-bit install on my laptop. Would that still cause a problem?

With /dev/sdb1 (boot partition of USB drive) mounted at `/mnt`:

$ sudo ls /mnt/etc/grub.d/bin/grubcfg_proxy
-rwxr-xr-x 1 root root 469160 Jul 25 11:39 /mnt/etc/grub.d/bin/grubcfg_proxy
$

$ echo 123 | sudo bin/grubcfg_proxy "+*"

123
$