A system administrator has noticed SELinux is preventing a web application from functioning properly on a production server running the 'targeted' policy. The administrator wants to temporarily relax SELinux enforcement to diagnose the issue without entirely disabling SELinux or making permanent policy changes. Which command should the administrator use to fulfill this requirement?
The setenforce 0 command sets SELinux to 'Permissive' mode. In 'Permissive' mode, SELinux continues to evaluate rules and log violations but does not enforce the policy, allowing the administrator to see what would be blocked without impacting the application. Once the evaluation is complete, using setenforce 1 would return SELinux to 'Enforcing' mode. 'setsebool -P' is used to make persistent changes to SELinux booleans, enforce 0 is invalid syntax, and setenforce enforcing uses incorrect terminology. The term 'Disabled' does not apply to runtime changes and is only set in SELinux config files which requires a reboot.
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What is SELinux and why is it used?
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