12
Character Meanin
Exam
les
[^]
Matches a single character not
contained within the brackets.
[^16A] means to match a string containing any
character except 1, 6 or A, and the matching string
can also contain 1, 6 or A, but cannot contain these
three characters only. For example, [^16A]
matches "abc" and "m16", but not 1, 16, or 16A.
\<string
Matches a character string starting
with string.
"\<do" matches word "domain" and string "doa".
string\>
Matches a character string ending
with string.
"do\>" matches word "undo" and string "abcdo".
\bcharacter2
Matches character1character2.
character1 can be any character
except number, letter or underline,
and \b equals [^A-Za-z0-9_].
"\ba" matches "-a" with "-" being character1, and
"a" being character2, but it does not match "2a" or
"ba".
\Bcharacter
Matches a string containing
character, and no space is allowed
before character.
"\Bt" matches "t" in "install", but not "t" in "big
top".
character1\w
Matches character1character2.
character2 must be a number, letter,
or underline, and \w equals
[A-Za-z0-9_].
"v\w" matches "vlan" ("v" is character1 and "l" is
character2) and "service" ( "i" is character2).
\W Equals \b.
"\Wa" matches "-a", with "-" being character1,
and "a" being character2, but does not match "2a"
or "ba".
\
Escape character. If a special
character listed in this table follows
\, the specific meaning of the
character is removed.
"\\" matches a string containing "\", "\^" matches
a string containing "^", and "\\b" matches a string
containing "\b".
The following are several regular expression examples:
# Use | begin user-interface in the display current-configuration command to match the first line of
output that contains user-interface to the last line of output.
<Sysname> display current-configuration | begin user-interface
user-interface aux 0
user-interface vty 0 15
authentication-mode none
user privilege level 3
#
return
# Use | exclude Direct in the display ip routing-table command to filter out direct routes and display only
the non-direct routes.
<Sysname> display ip routing-table | exclude Direct
Routing Tables: Public
Destination/Mask Proto Pre Cost NextHop Interface
1.1.1.0/24 Static 60 0 192.168.0.0 Vlan1
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