My backup includes a very large number of files in a large number of dirs. At the end of an operation, I am seeing:
18 files were not included due to access errors
I have attempted to redirect stderr to a separate file, but it keep coming up empty. There are no obvious occurrences of any sort of an ERROR style message in the stdout output I have captured via tee.
What is the best way to identify (on Linux) the culprits please?