Questions where working on more than one line is a relevant aspect. In most cases that means repeating the same command(s) over several lines. – Related: the [repeated-commands] tag


Questions where  (potentially) working on multiple lines  is not a relevant aspect  should not be tagged , even if they relate to line multiplicity in some way. An example would be  counting the number of occurrences of a word in a file:  In this case it doesn't matter whether the file has one or multiple lines.