Here is a bug what I find when list a larger number of files in a directory: I have a directory that has $ls | wc -l 20246 files. However, if I type $ls *.dat | wc -l then i got errors: bash: /bin/ls: Argument list too long 0 I know thare are total more than 9500 files with surfix .dat. So I doubt if ls *.dat does not work for total files more than certain amount. My computer is laptop Linux 6.0, Inspiron 7000. I do not know if this is the bug of "ls" or laptop's problem.
