LPTEST(1) General Commands Manual LPTEST(1)NAME
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 char-
acters 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 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.
SEE ALSO BUGS 4.3 Berkeley Distribution April 29, 1985 LPTEST(1)
Check Out this Related Man Page
GREP(1) General Commands Manual GREP(1)NAME
grep, g - search a file for a pattern
grep [ option ... ] pattern [ file ... ]
g [ option ... ] pattern [ file ... ]
Grep searches the input files (standard input default) for lines that match the pattern, a regular expression as defined in regexp(7) with
the addition of a newline character as an alternative (substitute for |) with lowest precedence. Normally, each line matching the pattern
is `selected', and each selected line is copied to the standard output. The options are
-c Print only a count of matching lines.
-h Do not print file name tags (headers) with output lines.
-e The following argument is taken as a pattern. This option makes it easy to specify patterns that might confuse argument parsing,
such as -n.
-i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre-
tation. Matched lines are printed in their original form.
-l (ell) Print the names of files with selected lines; don't print the lines.
-L Print the names of files with no selected lines; the converse of -l.
-n Mark each printed line with its line number counted in its file.
-s Produce no output, but return status.
-v Reverse: print lines that do not match the pattern.
-f The pattern argument is the name of a file containing regular expressions one per line.
-b Don't buffer the output: write each output line as soon as it is discovered.
Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name
Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
single quotes '...'. An expression starting with '*' will treat the rest of the expression as literal characters.
G invokes grep with -n and forces tagging of output lines by file name. If no files are listed, it searches all files matching
*.C *.b *.c *.h *.m *.cc *.java *.cgi *.pl *.py *.tex *.ms
SEE ALSO ed(1), awk(1), sed(1), sam(1), regexp(7)DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
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