Cisco 6500 - Catalyst Series 10 Gigabit EN Interface Module Expansion, Configuration Manual, Page: 658 / 742

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Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM
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Appendix C Using the Command-Line Interface
Command Help
Command Help
Help information is available from the command line by entering the following commands:
•
help command_name
Shows help for the specific command.
•
help ?
Shows commands for which there is help.
•
command_name ?
Shows a list of arguments available.
•
string ? (no space)
Lists the possible commands that start with the string.
•
? and +?
Lists all commands available. If you enter ? , the FWSM shows only commands available for the
current mode. To show all commands available, including those for lower modes, enter +? .
Note
If you want to include a question mark (?) in a command string, you must press Ctrl-V before typing the
question mark so you do not inadvertently invoke CLI help.
Filtering show Command Output
You can use the vertical bar (|) with any show command and include a filter option and filtering
expression. The filtering is performed by matching each output line with a regular expression, similar to
Cisco IOS software. By selecting different filter options you can include or exclude all output that
matches the expression. You can also display all output beginning with the line that matches the
expression.
The syntax for using filtering options with the show command is as follows:
hostname# show command | { include | exclude | begin | grep [ -v ]} regexp
In this command string, the first vertical bar (|) is the operator and must be included in the command.
This operator directs the output of the
show command to the filter. In the syntax diagram, the other
vertical bars (|) indicate alternative options and are not part of the command.
The include option includes all output lines that match the regular expression. The grep option without
-v has the same effect. The exclude option excludes all output lines that match the regular expression.
The grep option with -v has the same effect. The begin option shows all the output lines starting with
the line that matches the regular expression.
Replace regexp with any Cisco IOS regular expression. See The regular expression is not enclosed in quotes
or double-quotes, so be careful with trailing white spaces, which will be taken as part of the regular
expression.
When creating regular expressions, you can use any letter or number that you want to match. In addition,
certain keyboard characters have special meaning when used in regular expressions.
Table C-2 lists the
keyboard characters that have special meaning.