Optional. Enable password complexity to validate the password strength. By default this option is disabled.

For a native user account, if you enable password complexity, use the following guidelines when you create or change a password:

The length of the password must be at least eight characters.
It must be a combination of an alphabet character, a numeric character and a non-alphanumeric character, such as:
! \ " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ ] ^ _ ` { | } ~

When you use special characters in a password, the shell sometimes interprets them differently. For example, $ is interpreted as a variable. In this case, use an escape character to escape the special character.