For command ls   -F, --classify          append indicator (one of */=>@|) to entriesWikipedia says * represents executable and / dir. Regular files are not followed by any of the above symbols.But * follows text file and pdf file too. Are they executables?Do the -F indicators always mean same as the first field in -rwxrwx---?It seems like there is no difference between hardlinks and the files  in either the -F indicators or the first field in -rwxrwx---. How do you distinguish them?Thanks.
The -F option for ls
ls