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 execute it.

Additionally the SUID bit is set, which means when it's executed the process will run with this file's user ID, not the executing user's. In modern shells this usually only affects binary executables, not scripts.

Group

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

Others

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