3 point/unit in Manipulation lesson

When I try to use command “ls -l” in each row there is no column group name “eng” (how it is presented in template). Why?

the example is just that, an example

in the example the files belong to eng group, while the files in exercise belong ccuser group.

an example doesn’t need to have the same group as the files in the lesson.

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Thanks, I was not attentive)