Other - Bash: list only certain files

Hi

I think I have a temporary lapse of reason...

I cant figure out how to list only files that have only 7 digits in their names and all end in .txt.

like 7654321.txt or 4532123.txt

I don't want to list files that have not exactly y digits in their name.

I tried:

ls [0-9]{7}.txt

but it doesn't work

ls [0-9]*.txt

works but returns of course any number of digits in the file name (not what I want)


Please advise.

Thanks

Try this: