10
10: Ten-GigabitEthernet1/0/1
Filtering the output from a display command
You can use the | { begin | exclude | include } regular-expression option to filter the display command
output:
• begin—Displays the first line matching the specified regular expression and all subsequent lines.
• exclude—Displays all lines not matching the specified regular expression.
• include—Displays all lines matching the specified regular expression.
• regular-expression—A case-sensitive string of 1 to 256 characters, which can contain the special
characters described in Table 5.
T
he f
iltering operation takes time. The more complicated the regular expression is, the longer time the
operation takes. To stop the operation, press Ctrl+C.
Table 5 Special characters supported in a regular expression
Characters Meanin
Exam
les
^ Matches the beginning of a line.
"^u" matches all lines beginning with "u". A line
beginning with "A" is not matched.
$ Matches the end of a line.
"r$" matches all lines ending with "r". A line
ending with "A" is not matched.
. (period) Matches any single character. ".s" matches "as" and "bs".
*
Matches the preceding character or
string zero, one, or multiple times.
"zo*" matches "z" and "zoo", and "(zo)*"
matches "zo" and "zozo".
+
Matches the preceding character or
string one or multiple times.
"zo+" matches "zo" and "zoo", but not "z".
|
Matches the preceding or succeeding
string.
"def|int" matches a line containing "def" or "int".
( )
Matches the string in the parentheses,
usually used together with the plus sign
(+) or asterisk sign (*).
"(123A)" matches "123A".
"408(12)+" matches "40812" and
"408121212", but not "408".
\N
Matches the preceding strings in
parentheses, with the Nth string
repeated once.
"(string)\1" matches a string containing
"stringstring".
"(string1)(string2)\2" matches a string containing
"string1string2string2".
"(string1)(string2)\1\2" matches a string
containing " string1string2string1string2".
[ ]
Matches a single character in the
brackets.
"[16A]" matches a string containing 1, 6, or A;
"[1-36A]" matches a string containing 1, 2, 3, 6,
or A (- is a hyphen).
To match the character "]", put it immediately after
"[", for example, []abc]. There is no such limit on
"[".