NAME¶
lptest —
generate lineprinter ripple
pattern
SYNOPSIS¶
DESCRIPTION¶
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
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 also be specified.
HISTORY¶
lptest appeared in
4.3BSD.