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XCCDF
Guide to the Secure Configuration of Red Hat Enterprise Linux 8
System Settings
Account and Access Control
Protect Accounts by Restricting Password-Based Login
Restrict Root Logins
Ensure Authentication Required for Single User Mode
Ensure Authentication Required for Single User Mode
An XCCDF Rule
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Ensure Authentication Required for Single User Mode
Medium Severity
Single user mode is used for recovery when the system detects an issue during boot or by manual selection from the bootloader.