How can you modify the boolean setting of a policy in a Linux system?

To modify a boolean setting of a policy in a Linux system, the correct tool to use is setsebool. This command is specifically designed to manage SELinux boolean settings, allowing users to toggle various security policies.

When using setsebool, you can enable or disable specific boolean options that control additional access permissions granted to certain processes or applications. For example, if you want to allow a specific type of network access that is usually restricted by the security policy, you would use setsebool to change its boolean setting accordingly.

The other options serve different purposes:

• chcon is used to change the SELinux security context of files and directories, but it does not modify boolean settings.

• ls -Z lists files along with their SELinux security context, providing information but not allowing for modifications.

• aa-complain is a command from AppArmor, which is another Linux security module. It switches a specified profile to a complain mode, where access violations are logged instead of enforced, but it doesn't relate to modifying booleans in SELinux.

Thus, setsebool is the right answer for modifying boolean settings in the context of SELinux on Linux systems.