![]() Hopefully, this is solution helped you to resolve “ Unknown collation: ‘utf8mb4_unicode_520_ci’” issue with MySQL databases.As a System administrator, you must set a strong password for the users and enforce a strong password policy. Because, so many system breaches are happened due to weak passwords. In this guide, we will learn how to implement some important Linux password policies using Pluggable Authentication Method, shortly known as PAM, in order to strengthen your Linux system's security.īefore getting into the topic, I'd like to list a few important key elements to remember before setting up the password policies. In most environments, the recommended password length is 8 characters.Īn eight-character password is recommended because it's long enough to provide adequate security and still short enough for users to easily remember. I strongly advice you not to go below this limit. Password length has been found to be a primary factor in characterizing password strength. ![]() The longer the password, the longer it will take to crack. Passwords that are too short prone to brute force attacks as well as to dictionary attacks using words and commonly chosen passwords. In fact, a longer password, even consisting of simpler words or constructs, is much better than a short password with special characters. The another important point to remember while choosing a password is to avoid commonly used passwords. More importantly, never ever use your real name, parents/spouse/kids name, school/college name, or your date of birth in your password. You might have added some of your personal and most of your educational and professional details in social (E.g. #KEEWEB REPLACE LOGOUT PROFESSIONAL#įacebook) and professional networks (E.g. ![]() An attacker might try to guess the password from these details. Hence, you should not include the aforementioned details in your passwords. Some Linux admins put too much restrictions on users to choose a password. While this is best for the security, it also could be counterproductive. The users will be frustrated of the strong password policies and choose worse passwords to meet the password policy.įor instance, a user will add complexity to his/her password by simply adding a number or special character like "1" or "!" to the end or capitalizing the first letter of their password.
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