TestOut Linux Pro Practice Test

Using the command `chmod u+s /usr/bin/xmms` sets the SUID (Set Owner User ID) bit on the `xmms` executable. This special permission allows the executable to run with the privileges of the file's owner, which is typically root, rather than the privileges of the user who is executing it.

When a user runs the `xmms` program, it will operate with the permissions of the root user, enabling access to system resources that may not be permitted under the user's standard user privileges. This is particularly useful for applications that need elevated permissions to perform certain tasks, such as accessing hardware or other restricted resources.

In summary, setting the SUID bit allows the executable to inherit the permissions of its owner, facilitating operations that require higher privileges than those granted to the user running the program. This is why the choice indicating that it sets the SUID bit to run as root is correct.