4 File Permissions

Each file in Linux has three independent permissions.

• Read (abbreviated ``r''). If a file is readable, the content of the file is available for reading. This also means the ability to be copied.
• Write (abbreviated ``w''). If a file is writeable, the content of the file can be overwritten (and altered).
• Execute (abbreviated ``x''). If a file is executable, its content can be executed (run). The interesting part is that a file can be executable even when it is not readable.