UNIX File Permissions Tool

Bits
type attrs user group others
SUID SGID sticky r w x r w x r w x
Symbolic
Numeric

User

The owner of the character device can read and write it.

Additionally the SUID bit is set, which means different things for different resource types.

Group

A member of the character device's group other than its owner can read, write, and execute it.

Additionally the SGID bit is set, which means different things for different resource types.

Others

Any other user on the system cannot access it at all.