H3C S5120-SI Series Configuration Manual page 32

For the support of the display commands for regular expressions, see the corresponding command
reference.
There are two ways to filter output information.
Input the begin, exclude, or include keyword plus a regular expression in the display command
to filter the output information.
When the system displays the output information in multiple screens, use /, - or + plus a regular
expression to filter subsequent output information. / equals the keyword begin, - equals the
keyword exclude, and + equals the keyword include.
The following describes the begin, exclude, and include keywords:
begin: Displays the line that matches the regular expression and all the subsequent lines.
exclude: Displays the lines that do not match the regular expression.
include: Displays the lines that match the regular expression.
A regular expression is a case sensitive string of 1 to 256 characters. It also supports the following
special characters.
Character
Starting sign. string appears only at
^string
the beginning of a line.
Ending sign. string appears only at
string$
the end of a line.
Matches any single character, such
. as a single character, a special
character, and a blank.
Matches the preceding character or
* character group zero or multiple
times.
Matches the preceding character or
+ character group one or multiple
times
Matches the preceding or
|
succeeding character string
If it is at the beginning or the end of a
regular expression, it equals ^ or $.
_ In other cases, it equals comma,
space, round bracket, or curly
bracket.
It connects two values (the smaller
one before it and the bigger one after
-
it) to indicate a range together with
[ ].
Meaning
1-18
Remarks
For example, regular expression "^user" only
matches a string beginning with "user", not "Auser".
For example, regular expression "user$" only
matches a string ending with "user", not "userA".
For example, ".l" matches both "al" and "bl".
For example, "zo*" matches "z" and "zoo"; "(zo)*"
matches "zo" and "zozo".
For example, "zo+" matches "zo" and "zoo", but not
"z".
For example, "def|int" only matches a character
string containing "def" or "int".
For example, "a_b" matches "a b" or "a(b"; "_ab" only
matches a line starting with "ab"; "ab_" only matches
a line ending with "ab".
For example, "1-9" means 1 to 9 (inclusive); "a-h"
means a to h (inclusive).