How to check that file exists on AppVm from dom0 bash script? 

Or simple get the exit code of the remote process? 

status=$(qvm-run --pass-io $appvm "test -r $file; echo $?" > 
file_with_exit_code_always_with_null_why

status=$(qvm-run --pass-io $appvm "cat $file" > dom0file
If $file is not exists how to get notify about it on bash script?

thanks

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