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 file can read and write it.

Additionally the SUID bit is set, which has no effect on non-executable files.

Group

A member of the file's group other than its owner can read it.

Additionally the SGID bit is set, which has no effect on non-executable files.

Others

Any other user on the system can write it.

Additionally the sticky bit is set, which really only means something on directories, these days.