套件：rs（20200313-1） [debports]
reshape a data array
rs reads the standard input, interpreting each line as a row of blank-separated entries in an array, transforms the array according to the options, and writes it on the standard output. Numerous options control input, reshaping and output processing; the simplest usage example is "ls -1 | rs", which outputs the same (on an 80-column terminal) as the modern "ls" with no "-1" argument.