Regular Expression Pattern Matching
Examples
The following examples illustrate uses of regular expression pattern matching.
snmp-server community public
Finds any line that includes the text snmp-server community public. There
can be text before and/or after the string on the same line.
service tcp-keepalives-in.*\n(.*\n)*.*service tcp-keepalives-out
Finds the first line service tcp-keepalives-in and then looks for service tcp-
keepalives-out on any line after that. The regular expression string .*\n(.*\n)
*.* is used to search any number of lines between strings.
access-list 105 deny.*tcp any any eq 139 log
Finds the line with access-list 105 deny, followed by any number of characters
of any type, followed by tcp any any eq 139 log on the same line. The regular
expression string .* finds any character and any number of characters on the
same line. This expression can be used to find spaces, tabs, numbers, letters,
or special characters.
ntp clock-period \d*
Finds any line that includes ntp clock-period, followed by any number. The
regular expression string \d* will find any number at any length, such as 3, 48,
or 2394887.
user \x2a
Finds any line that includes user *. The regular expression string \x, followed
by a hexadecimal value, specifies an individual character. In this example, \x2a
represents the asterisk character, which has a hexadecimal value of 2a.
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Regular Expression Pattern Matching Examples
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