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 link can write it.

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

Group

A member of the link's group other than its owner can follow it.

Others

Any other user on the system can write and follow it.

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