.hd copy "copy standard input to standard output" 02/22/82 copy .ds 'Copy' is Kernighan and Plauger's copy command from chapter two of [ul Software Tools]. It simply copies its standard input to its standard output until end-of-file. .es file1> copy >file2 list_file> copy copy >data copy .sa cat (1), cp (1), print (1), fcopy (2)