How to put the sofa in the horizontal hall? I want to be against the wall.

In this case, a cabinet can be used to cover the back of the sofa. If it is close to the wall, a storage cabinet with an upward opening that is almost as high as or a little shorter than the sofa can be added to fill the gap between the sofa and the wall to form a storage space. If it is far away, you can get a cabinet with its opening facing away from the sofa. The cabinet can be as high as the sofa to form a storage space, or you can use a thinner one to form a space interval. You can also use some shelves higher than the sofa, which can not only put some furnishings but also form a space interval. Of course, it depends on the overall layout.