Question: Two lists, foo1 and foo2 , contain names of users (one per line). How do you create a third list of users who are present

Two lists, foo1 and foo2, contain names of users (one per line). How do you create a third list of users who are present in foo2 but absent in foo1? When will the command sequence not work properly?

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Two lists, foo1 and foo2 , contain names of users (one per line). How do you create a third list of users who are present in foo2 but absent in foo1 ? When will the command sequence not work properly?

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