To check the current mode of SELinux, which command should be used?

The command to check the current mode of SELinux is "getenforce." This command provides a straightforward way to determine whether SELinux is enforcing, permissive, or disabled. When executed, it will return one of these three states, reflecting SELinux's operational status on the system.

While "sestatus" is also a valid command to check SELinux status, "getenforce" is specifically designed to give a quick and concise output of the current mode. The command "setenforce" is used for changing the enforcement mode of SELinux but does not provide information about its current setting. The command "chage" is related to managing user password aging and has no relevance to SELinux configurations.

Thus, using "getenforce" is the most direct and efficient way to verify the operating mode of SELinux on a Linux system.