3.7 File Maintenance Commands
When using the "ls -lg" command on a file (ls -l on SysV), the output will appear as follows:
-rwxr-x--- user unixgroup size Month nn hh:mm filename
The area above designated by letters and dashes (-rwxr-x---) is the area showing the file type and permissions as defined in the previous Section. Therefore, a permission string, for example, of -rwxr-x--- allows the user (owner) of the file to read, write, and execute it; those in the unixgroup of the file can read and execute it; others cannot access it at all.