Which commands can be used to get information on the proper use of ls?

The command used to obtain information about the proper use of ls is effectively represented by both man ls and info ls.

Utilizing man ls will display the manual page for the ls command, which includes detailed information about its options, usage, and behaviors. This is a standard way in Unix-like systems to get comprehensive documentation on commands.

Similarly, info ls provides access to the GNU info documentation related to ls, which is often more structured and might include additional examples and descriptions that are not present in the manual pages.

Both of these commands serve the same purpose: to facilitate understanding of how to use ls effectively. They are complementary resources available in the Linux environment, enabling users to access command documentation through different formats.

While help ls is also a viable command for getting basic information on shell built-ins, it is not applicable here since ls is not a shell built-in but a separate executable. Thus, for gaining useful insights specifically about the ls command, both man and info are suitable and accurate choices.