The meaning of the bytes depends solely on the programs that interpret the file. All files in UNIX are organised into directories. Every time you login you will find yourself positioned in this directory. Files in the UNIX system are grouped into directories and the directories are organised into a hierarchy or tree. The top of the hierarchy is a special directory called the root directory.
Every file has a filename.
You will, however, avoid confusion if you choose characters from the following list. No other file can use this name. Like children of one parent, no two files in the same directory can have the same name. Files in different directories, like children of different parents, can have the same name. The command ls -a displays all filenames, even invisible ones.