11
To do…
Use the command…
Remarks
Disable the multi-screen display
function
screen-length disable
Required
By default, a login user uses the
settings of the
screen-length
command. The default settings of the
screen-length
command are:
multiple-screen display is enabled
and up to 24 lines are displayed on
the next screen.
This command is executed in user
view, and takes effect for the current
user only. When the user re-logs into
the switch, the default configuration
is restored.
Filtering output information
Introduction
You can use regular expressions in
display
commands to filter output information.
The following methods are available for filtering output information:
•
Enter 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 definitions apply to the
begin
,
exclude
, and
include
keywords:
•
begin
: Displays the first line that matches the specified regular expression and all lines that follow.
•
exclude
: Displays all lines that do not match the specified regular expression.
•
include
: Displays all lines that match the specified regular expression.
A regular expression is a case-sensitive string of 1 to 256 characters. It supports the following special
characters.
Character Meaning
Remarks
^string
Starting sign. Matches a line that
starts with
string
.
For example, regular expression “^user” matches a
line beginning with “user”, not “Auser”.
string$
Ending sign. Matches a line that
ends with
string
.
For example, regular expression "user$” matches a
line ending with “user”, not “userA”.
.
Matches any single character, such
as a single character, a special
character, and a blank.
For example, “s” matches both “as” and “bs”.
*
Matches the preceding character or
character group zero or multiple
times.
For example, “zo*” matches “z” and “zoo”;
“(zo)*” matches “zo” and “zozo”.
+
Matches the preceding character or
character group one or multiple
times
For example, “zo+” matches “zo” and “zoo”, but
not “z”.
