If you want to find the executables, try ls -l (you may be able to use ll). The output looks like this.
total 156
drwxr-xr-x 5 root root 4096 Oct 7 18:52 buttons
drwxr-xr-x 2 root root 4096 Oct 7 18:52 help
drwxr-xr-x 2 root root 4096 Oct 7 18:52 images
-rw-r--r-- 1 root root 592 May 15 2001 opera_16x16.png
-rw-r--r-- 1 root root 825 May 15 2001 opera_22x22.png
-rw-r--r-- 1 root root 1139 May 15 2001 opera_32x32.png
-rw-r--r-- 1 root root 1648 May 15 2001 opera_48x48.png
-rw-r--r-- 1 root root 108263 May 15 2001 opera.adr
-rw-r--r-- 1 root root 101 May 15 2001 opera.desktop
-rw-r--r-- 1 root root 152 May 15 2001 opera.wmconfig
-rw-r--r-- 1 root root 1322 May 15 2001 opera.xpm
drwxr-xr-x 2 root root 4096 Oct 7 18:52 styles
The ones marked drwxr-xr-x are directories (thus, the d).
[matt@linux opera]$ ll /usr/bin/op*
-rwxr-xr-x 1 root root 7132 Feb 23 2001 /usr/bin/open
-rwxr-xr-x 1 root root 771448 Mar 13 2001 /usr/bin/openjade
-rwxr-xr-x 1 root root 278988 Mar 14 2001 /usr/bin/openssl
-rwxr-xr-x 1 root root 10272 Mar 12 2001 /usr/bin/openvt
-rwxr-xr-x 1 root root 6397088 May 15 2001 /usr/bin/opera
[matt@linux opera]$
You'll usually find your executables in bin directories (/bin, /usr/bin, /usr/local/bin, etc). In this case, my Opera directory is in /usr/share but the executable is in /usr/bin - note the -rwxr-xr-x.
Your file listing may have a color scheme also. I use Red Hat 7.1 and by default, directories were listed in blue, executables in green.
Hope this helps.