LPTEST(1) General Commands Manual LPTEST(1)
lptest - generate lineprinter ripple pattern
lptest [ length [ count ] ]
lptest writes the traditional "ripple test" pattern on standard output.
In 96 lines, this pattern will print all 96 printable ASCII characters
in each position. While originally created to test printers, it is
quite useful for testing terminals, driving terminal ports for debug-
ging purposes, or any other task where a quick supply of random data is
The length argument specifies the output line length if the default
length of 79 is inappropriate.
The count argument specifies the number of output lines to be generated
if the default count of 200 is inappropriate. Note that if count is to
be specified, length must be also be specified.
16 February 1988 LPTEST(1)