H3C Technologies H3C SecBlade NetStream Cards - Manual (Page 26)

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 device,
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:
• 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 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. string appears only at
the beginning of a line.
For example, regular expression “^user” only
matches a string beginning with “user”, not
“Auser”.
string$
Ending sign. string appears only at
the end of a line. For example, regular expression "user$” only
matches a string 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”.
|
Matches the preceding or
succeeding character string For example, “def|int” only matches a character
string containing “def” or “int”.