| 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 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.
lptest appeared in
4.3BSD.
| May 31, 2007 | Debian |