Hello, The man page for the ls command displays the following option --sort=WORD extension -X, none -U, size -S, time -t, version -v However, when I type ls --sort- -X, to sort by extension, ls displays the following error message ls: invalid argument `-X' for `--sort' Valid arguments are: - `none' - `time' - `size' - `extension' - `version' Try `ls --help' for more information. When I type ls --sort=extension, the current directory is sorted by the file extension, which is what I want. The man page is listing the wrong information for this option. thanks Tony _______________________________________________ Bug-fileutils mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-fileutils