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LPTEST(1) | General Commands Manual | LPTEST(1) |
NAME¶
lptest
—
generate lineprinter ripple pattern
SYNOPSIS¶
lptest |
[length] [count] |
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.
May 31, 2007 | Linux 4.9.0-9-amd64 |