I have several hundreds of directories and in each of these directories there are files with date in their filenames, like this:
Sometimes it happens that a certain file does not get generated in a certain folder. Continuing from the previous example, file 20190916.file.gz might be missing in dir2:
How could I list only directory names that do not contain 20190916.file.gz?
$find . | grep 20190916 would list all folders that do contain this file, so basically I only need to somehow reverse the output of this command