Each permission for owner, group, and other has a unique octal value, as shown in the table below.
Read | Write | Execute | |
---|---|---|---|
POSIX owner |
400 |
200 |
100 |
POSIX group |
040 |
020 |
100 |
Other |
004 |
002 |
001 |
You can represent permissions numerically by combining these values. For example, the octal value 755 represents these permissions:
POSIX owner has read, write, and execute permissions (700).
POSIX group has read and execute permissions (050).
Other has read and execute permissions (005).
With NFS, you can use these values to specify permissions.
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