Detailed explanation of Linux account file control and management steps
In Linux systems, in addition to various accounts manually created by users, there are also a large number of accounts generated along with the system or program installation process. In addition to root, a large number of other accounts are used only to maintain system operation, start or maintain service processes, and generally do not allow login, so they are also called non-login users.
For long-term unused user accounts on Linux servers, you can temporarily lock them. Account configuration information is placed in/etc/passwd and/etc/shadow, and accounts can be managed with the chattr command.
chattr +i lock file chattr -i unlock file
lsattr View file status
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