Simplest way to know about executable files

[WinHost]

If the /tmp directory contains any of the executable file, all the sites stops. The simplest way to know executable file in a directory is by using -F option with ls command, which distinguishes directory and executable files from ordinary files. The -F option causes a slash (/) to be appended to the filename for directories and an asterisk (*) to be appended to files which are executable. For example,

$ ls -F

[WinHost]

$ ls -a (displays the hidden files)
$ ls -F (causes a slash (/) to be appended to the filename for directories and an asterisk (*) to be appended to files which are executable)
$ ls -q (displays the non-printable characters in file name with the ?)
$ ls -b (displays the non-printable characters in file name with the octal number)
$ ls -lu (causes the last access time stamp to be displayed instead of the last modification time)
$ ls -ls (gives the file size in blocks instead of bytes)
$ ls -t (Sorts the output by time stamp instead of name)
$ ls -r (Reverses the order of the output. By itself, displays the output in reverse alphabetic order, used with -t, displays the output by the most recent time stamp)
ls -x (Forces the output into multicolumn)