HP ProCurve 9304M Installation And Configuration Manual page 64

Installation and Basic Configuration Guide
Table 2.5: Special Characters for Regular Expressions (Continued)
Character Operation
* The asterisk matches on zero or more sequential instances of a pattern.
For example, the following regular expression matches output that contains the string
"abc", followed by zero or more Xs:
abcX*
+ The plus sign matches on one or more sequential instances of a pattern.
For example, the following regular expression matches output that contains "de", followed
by a sequence of "g"s, such as "deg", "degg", "deggg", and so on:
deg+
? The question mark matches on zero occurrences or one occurrence of a pattern.
For example, the following regular expression matches output that contains "dg" or "deg":
de?g
Note: Normally when you type a question mark, the CLI lists the commands or options at
that CLI level that begin with the character or string you entered. However, if you enter Ctrl-
V and then type a question mark, the question mark is inserted into the command line,
allowing you to use it as part of a regular expression.
^ A caret (when not used within brackets) matches on the beginning of an input string.
For example, the following regular expression matches output that begins with "deg":
^deg
$ A dollar sign matches on the end of an input string.
For example, the following regular expression matches output that ends with "deg":
deg$
_ An underscore matches on one or more of the following:
For example, the following regular expression matches on "100" but not on "1002", "2100",
and so on.
_100_
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• , (comma)
• { (left curly brace)
• } (right curly brace)
• ( (left parenthesis)
• ) (right parenthesis)
• The beginning of the input string
• The end of the input string
• A blank space