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Command: lptest | Section: 1 | Source: FreeBSD | File: lptest.1.gz
LPTEST(1) FreeBSD General Commands Manual LPTEST(1)
NAME
lptest - generate lineprinter ripple pattern
SYNOPSIS
lptest [length] [count]
DESCRIPTION
The lptest utility 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 debugging purposes, or any other task where a quick supply of
random data is needed.
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.
HISTORY
A lptest utility appeared in 4.3BSD.
FreeBSD 14.1-RELEASE-p8 December 30, 1993 FreeBSD 14.1-RELEASE-p8