The method of checking user's password in linux system
Open the terminal, enter head-3 / etc/passwd, enter, and you can check the first three passwords.
Open the terminal, enter cat / etc/shadow, enter, and you can see all the users and passwords.
Open the terminal, enter ls-l / etc/passwd / etc/shadow, enter, and you can check the password permission.
These are the details of how the linux system checks passwords. Please pay attention to other related articles for more information.