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lang-bash
.??*This will include digits and other signs which may end up in file names :).??*misses any single character name dot files; e.g..a. Admittedly such would be unlikely to exist, but it's worth pointing out..[^.]*?......[^.]does have the appropriate meaning in a POSIX regex. 3. But POSIX filename-expansion doesn't use the same rules as POSIX regex. (If it did, then.*would mean "zero or more characters" rather than "a dot, plus zero or more characters".) 4. And in POSIX filename-expansion, you have to write[!rather than[^-- the meaning of the latter is unspecified. 5. But the question specifically calls out Bash, not a generic POSIX shell, and Bash filename-expansion does support[^as equivalent to[!.