What is the purpose of the '-P' flag in the setsebool command?

The '-P' flag in the setsebool command is utilized to apply changes to SELinux booleans persistently across system reboots. When this flag is used, it ensures that the setting remains in effect even after the system is restarted, making it a crucial option for administrators who need certain boolean values to remain unchanged between sessions. This capability is significant for maintaining consistent security policies as defined by SELinux, as it avoids the need to reapply settings every time the system is booted.

In contrast, other options serve different purposes. Some of the options don't involve persistence at all; for instance, there are flags that might only affect the current session or allow for previews of changes without committing them to persistent storage. The focus on the persistent nature of the '-P' flag is essential for effectively managing SELinux policies in environments where security and system behavior must be carefully controlled across restarts.