You can delete only the files that are present in your default folder. Whenever you re using UNIX, you re using a shell program. It stores information for you. It runs programs for you. These are only some of the things a shell does.
Many shells have many more functions than mentioned above.
Basic Commands Identify your current directory. When you log into a UNIX system, you are given a working directory. Whenever you give a command, the UNIX system tries to find that command in the directory you are in first and then elsewhere. To see what files are in another directory, type the directory name after the ls . Normally the ls command does not distinguish between files and directories.